[llvm] [mcp-frameinst: 1/3]: [MCP][NFC] Cleanup and prepare to preserve frame-setup/destroy (PR #186240)

[Scott Linder via llvm-commits]

slinder1 wrote:

@s-barannikov I plan to merge this tomorrow, let me know if you still would like any changes and I can do them post-merge

https://github.com/llvm/llvm-project/pull/186240