[clang-tools-extra] [clang-tidy] Add bugprone-move-shared-pointer-contents check. (PR #67467)

[Piotr Zegar via cfe-commits]

https://github.com/PiotrZSL requested changes to this pull request.

@pizzud
To be honest I see this check being already done in 99%.
Please resolve some last nits, rebase code and we could merge it in this month.

https://github.com/llvm/llvm-project/pull/67467