[clang] [clang][bytecode] Add assert to ensure correct state restoration in CallBI function (PR #115496)

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smanna12 wrote:

> Please reword the title of the PR. It sounds like this commit is actually fixing anything but it just silences the static analyzer.

Thanks @tbaederr for reviews! I have updated title and commit message.

https://github.com/llvm/llvm-project/pull/115496