Fix #19664: Static extension overload resolution for generic types

[T-Gro]

Fixes #19664

When resolving Type<TArg>.Member(...), the name resolver uses LookupIsInstance.Yes (dot-expression form) but finds static intrinsic members. The extension member lookup then also filters for instance-only extensions, missing the static extension overloads entirely.

The fix detects this mismatch and relaxes the filter to LookupIsInstance.Ambivalent so static extensions are included in overload resolution.

type StaticGeneric<'T> =
    static member Bar() = ()

[<AutoOpen>]
module StaticGenericExtensions =
    type StaticGeneric<'T> with
        static member Bar(_: int) = ()  // Previously: FS0505

StaticGeneric<int>.Bar(42)  // Now resolves correctly

[github-actions]

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Change path	Release notes path	Description
src/Compiler	docs/release-notes/.FSharp.Compiler.Service/11.0.100.md	No current pull request URL (#19736) found, please consider adding it

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