[clang] [clang][Interp] Do not call dtors of union members (PR #102739)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clangd-ubuntu-tsan` running on `clangd-ubuntu-clang` while building `clang` at step 5 "build-clangd-clangd-index-server-clangd-indexer".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/134/builds/3229

Here is the relevant piece of the build log for the reference:
```
Step 5 (build-clangd-clangd-index-server-clangd-indexer) failure: build (failure)

```

https://github.com/llvm/llvm-project/pull/102739