Rollup of 9 pull requests

[GuillaumeGomez]

Successful merges:

• Promote arm64ec-pc-windows-msvc to tier 2 #126039 (Promote arm64ec-pc-windows-msvc to tier 2)
• Remove DebugWithInfcx machinery #126075 (Remove DebugWithInfcx machinery)
• Provide correct parent for nested anon const #126228 (Provide correct parent for nested anon const)
• interpret: dyn trait metadata check: equate traits in a proper way #126232 (interpret: dyn trait metadata check: equate traits in a proper way)
• Simplify provider api to improve llvm ir #126242 (Simplify provider api to improve llvm ir)
• coverage: Replace the old span refiner with a single function #126294 (coverage: Replace the old span refiner with a single function)
• No uninitalized report in a pre-returned match arm #126295 (No uninitalized report in a pre-returned match arm)
• Update rustc-perf submodule #126312 (Update rustc-perf submodule)
• Follow up to splitting core's PanicInfo and std's PanicInfo #126322 (Follow up to splitting core's PanicInfo and std's PanicInfo)

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