[llvm] [ORC] Further simplify ContainerElementsMap::hoistDeps. NFCI. (PR #185242)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-flang-rhel-clang` running on `ppc64le-flang-rhel-test` while building `llvm` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/45089

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-flang) failure: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
...
22.265 [2/8/31] Linking CXX executable tools/flang/unittests/Common/FlangCommonTests
38.607 [2/7/32] Linking CXX executable tools/flang/unittests/Frontend/FlangFrontendTests
73.092 [2/6/33] Building CXX object tools/flang/unittests/Optimizer/CMakeFiles/FlangOptimizerTests.dir/FIRContextTest.cpp.o
88.321 [2/5/34] Building CXX object tools/flang/unittests/Optimizer/CMakeFiles/FlangOptimizerTests.dir/InternalNamesTest.cpp.o
98.702 [2/4/35] Building CXX object tools/flang/unittests/Optimizer/CMakeFiles/FlangOptimizerTests.dir/FIRTypesTest.cpp.o
111.383 [2/3/36] Building CXX object tools/flang/unittests/Optimizer/CMakeFiles/FlangOptimizerTests.dir/FortranVariableTest.cpp.o
123.269 [2/2/37] Building CXX object tools/flang/unittests/Optimizer/CMakeFiles/FlangOptimizerTests.dir/KindMappingTest.cpp.o
136.049 [2/1/38] Building CXX object tools/flang/unittests/Optimizer/CMakeFiles/FlangOptimizerTests.dir/RTBuilder.cpp.o
163.731 [1/1/39] Linking CXX executable tools/flang/unittests/Optimizer/FlangOptimizerTests
163.732 [0/1/39] Running the Flang regression tests
command timed out: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1364.807209

```

</details>

https://github.com/llvm/llvm-project/pull/185242