[clang] [Clang] Clarify diagnostic notes for implicitly generated deduction guides (PR #96084)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `premerge-monolithic-linux` running on `premerge-linux-1` while building `clang` at step 7 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/153/builds/1796

Here is the relevant piece of the build log for the reference:
```
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'UBSan-ThreadSanitizer-lld-x86_64 :: TestCases/Integer/suppressions.cpp' FAILED ********************
Exit Code: 66

Command Output (stderr):
--
RUN: at line 1: /build/buildbot/premerge-monolithic-linux/build/./bin/clang  --driver-mode=g++ -fsanitize=thread  -m64 -fuse-ld=lld  -fsanitize=integer -g0 /build/buildbot/premerge-monolithic-linux/llvm-project/compiler-rt/test/ubsan/TestCases/Integer/suppressions.cpp -o /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
+ /build/buildbot/premerge-monolithic-linux/build/./bin/clang --driver-mode=g++ -fsanitize=thread -m64 -fuse-ld=lld -fsanitize=integer -g0 /build/buildbot/premerge-monolithic-linux/llvm-project/compiler-rt/test/ubsan/TestCases/Integer/suppressions.cpp -o /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
RUN: at line 11: env UBSAN_OPTIONS=halt_on_error=1 not  /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp 2>&1 | FileCheck /build/buildbot/premerge-monolithic-linux/llvm-project/compiler-rt/test/ubsan/TestCases/Integer/suppressions.cpp
+ env UBSAN_OPTIONS=halt_on_error=1 not /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
+ FileCheck /build/buildbot/premerge-monolithic-linux/llvm-project/compiler-rt/test/ubsan/TestCases/Integer/suppressions.cpp
RUN: at line 13: echo "signed-integer-overflow:/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp" > /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.wrong-supp
+ echo signed-integer-overflow:/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
RUN: at line 14: env UBSAN_OPTIONS=halt_on_error=1:suppressions='"/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.wrong-supp"' not  /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp 2>&1 | FileCheck /build/buildbot/premerge-monolithic-linux/llvm-project/compiler-rt/test/ubsan/TestCases/Integer/suppressions.cpp
+ env 'UBSAN_OPTIONS=halt_on_error=1:suppressions="/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.wrong-supp"' not /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
+ FileCheck /build/buildbot/premerge-monolithic-linux/llvm-project/compiler-rt/test/ubsan/TestCases/Integer/suppressions.cpp
RUN: at line 16: echo "unsigned-integer-overflow:do_overflow" > /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.func-supp
+ echo unsigned-integer-overflow:do_overflow
RUN: at line 17: env UBSAN_OPTIONS=halt_on_error=1:suppressions='"/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.func-supp"'  /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
+ env 'UBSAN_OPTIONS=halt_on_error=1:suppressions="/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.func-supp"' /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
RUN: at line 21: echo "unsigned-integer-overflow:suppressions.cpp.tmp" > /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.module-supp
+ echo unsigned-integer-overflow:suppressions.cpp.tmp
RUN: at line 22: env UBSAN_OPTIONS=halt_on_error=1:suppressions='"/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.module-supp"'  /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
+ env 'UBSAN_OPTIONS=halt_on_error=1:suppressions="/build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp.module-supp"' /build/buildbot/premerge-monolithic-linux/build/runtimes/runtimes-bins/compiler-rt/test/ubsan/ThreadSanitizer-lld-x86_64/TestCases/Integer/Output/suppressions.cpp.tmp
WARNING: ThreadSanitizer: unexpected memory mapping 0x79ffff872000-0x79ffffd00000
FATAL: ThreadSanitizer: unexpectedly found incompatible memory layout.
FATAL: Please file a bug.

--

********************


```

https://github.com/llvm/llvm-project/pull/96084