Fixup some Vector<T> function lookups to use the right name/type

[tannergooding]

This resolves #119066 and resolves #118848

This will need backport to .NET 10

[Copilot]

Pull Request Overview

This PR fixes Vector function lookups to use the correct names and types in the JIT compiler. The changes address issues where comparison operations and the SquareRoot method were not being properly recognized by the intrinsic lookup system, which could lead to missed optimizations.

Key changes:

• Added mapping from "SquareRoot" to "Sqrt" for method name lookup
• Added HW_Flag_BaseTypeFromFirstArg flag to comparison intrinsics (Equals, GreaterThan, etc.) to ensure proper type resolution
• Added regression test to verify Vector.LessThan functionality

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/coreclr/jit/importercalls.cpp	Added method name mapping for SquareRoot to Sqrt
src/coreclr/jit/hwintrinsiclistxarch.h	Added BaseTypeFromFirstArg flag to comparison intrinsics for x86/x64
src/coreclr/jit/hwintrinsiclistarm64.h	Added BaseTypeFromFirstArg flag to comparison intrinsics for ARM64
src/tests/JIT/Regression/JitBlue/Runtime_119008/Runtime_119008.csproj	Test project configuration for regression test
src/tests/JIT/Regression/JitBlue/Runtime_119008/Runtime_119008.cs	Regression test verifying Vector.LessThan behavior

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[tannergooding]

/backport to release/10.0-rc1

[github-actions]

Started backporting to release/10.0-rc1: https://github.com/dotnet/runtime/actions/runs/17213927490

[jeffhandley]

/backport to release/10.0

[github-actions]

Started backporting to release/10.0: https://github.com/dotnet/runtime/actions/runs/17222455059