[clang] [llvm] [clang][ssaf] Add the TUSummaryExtractorRegistry (PR #173290)

[via cfe-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 128875 tests passed
* 2838 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Clang-Unit
<details>
<summary>Clang-Unit.Analysis/Scalable/_/ClangScalableAnalysisTests_exe/SummaryExtractorRegistryTest/InvokingExtractors</summary>

```
Script:
--
C:\_work\llvm-project\llvm-project\build\tools\clang\unittests\Analysis\Scalable\.\ClangScalableAnalysisTests.exe --gtest_filter=SummaryExtractorRegistryTest.InvokingExtractors
--
C:\_work\llvm-project\llvm-project\clang\unittests\Analysis\Scalable\Registries\SummaryExtractorRegistryTest.cpp:96
Expected equality of these values:
  FakeBuilder.consumeMessages()
    Which is: "MockSummaryExtractor1 destructor was invoked\nMockSummaryExtractor2 destructor was invoked\n"
  "MockSummaryExtractor2 destructor was invoked\n" "MockSummaryExtractor1 destructor was invoked\n"
    Which is: "MockSummaryExtractor2 destructor was invoked\nMockSummaryExtractor1 destructor was invoked\n"
With diff:
@@ -1,2 +1,2 @@
-MockSummaryExtractor1 destructor was invoked
-MockSummaryExtractor2 destructor was invoked\n
+MockSummaryExtractor2 destructor was invoked
+MockSummaryExtractor1 destructor was invoked\n



```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/173290