[llvm] [llvm-cgdata] Remove `GENERATE_DRIVER` option (PR #100066)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-libcxx` running on `linaro-flang-aarch64-libcxx` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/89/builds/2688

Here is the relevant piece of the build log for the reference:
```
Step 5 (build-unified-tree) failure: build (failure)
...
84.420 [437/26/6634] Creating library symlink lib/libLLVMCFIVerify.so
84.420 [437/25/6635] Linking CXX executable bin/llvm-cvtres
84.421 [437/24/6636] Linking CXX executable bin/llvm-debuginfo-analyzer
84.422 [437/23/6637] Linking CXX executable bin/lli-child-target
84.424 [437/22/6638] Linking CXX executable bin/llvm-c-test
84.429 [437/21/6639] Creating library symlink lib/libLLVMDiff.so
84.430 [437/20/6640] Linking CXX executable bin/llvm-debuginfod
84.431 [437/19/6641] Linking CXX executable bin/llvm-cxxmap
84.435 [437/18/6642] Linking CXX executable bin/llvm-dwp
84.443 [437/17/6643] Linking CXX executable bin/llvm-cgdata
FAILED: bin/llvm-cgdata 
: && /usr/local/bin/c++ -stdlib=libc++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -stdlib=libc++     -Wl,-rpath-link,/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/./lib  -Wl,--gc-sections tools/llvm-cgdata/CMakeFiles/llvm-cgdata.dir/llvm-cgdata.cpp.o -o bin/llvm-cgdata  -Wl,-rpath,"\$ORIGIN/../lib:/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/lib:"  lib/libLLVMCodeGen.so.19.0git  lib/libLLVMCodeGenData.so.19.0git  -lpthread  lib/libLLVMObject.so.19.0git  lib/libLLVMCore.so.19.0git  lib/libLLVMSupport.so.19.0git  -Wl,-rpath-link,/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/lib && :
/usr/bin/ld: /lib/aarch64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x18): undefined reference to `main'
/usr/bin/ld: (.text+0x1c): undefined reference to `main'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
84.443 [437/16/6644] Linking CXX executable bin/dsymutil
84.452 [437/15/6645] Linking CXX executable bin/llvm-dwarfdump
84.479 [437/14/6646] Linking CXX static library lib/libLLVMExegesis_static.a
84.486 [437/13/6647] Linking CXX executable bin/llc
84.506 [437/12/6648] Linking CXX executable bin/clang-check
84.527 [437/11/6649] Linking CXX executable bin/llvm-dwarfutil
84.532 [437/10/6650] Linking CXX executable bin/lli
84.548 [437/9/6651] Linking CXX executable bin/llvm-itanium-demangle-fuzzer
84.583 [437/8/6652] Linking CXX executable bin/llvm-ifs
84.584 [437/7/6653] Linking CXX executable bin/llvm-jitlink
84.639 [437/6/6654] Linking CXX executable bin/llvm-extract
84.647 [437/5/6655] Linking CXX shared library lib/libLLVMExegesis.so.19.0git
84.651 [437/4/6656] Linking CXX executable bin/llvm-gsymutil
84.658 [437/3/6657] Linking CXX executable bin/llvm-isel-fuzzer
84.897 [437/2/6658] Linking CXX shared library lib/libFIRDialect.so.19.0git
85.146 [437/1/6659] Linking CXX shared library lib/libFortranParser.so.19.0git
ninja: build stopped: subcommand failed.

```

https://github.com/llvm/llvm-project/pull/100066