HC0096: Support non-generic attributes with typeof() argument

[N-Olbert]

Currently HC0096 only works for generic [ExtendObjectType<T>] attributes.
This PR adds the same functionality for the older but equivalent [ExtendObjectType(typeof(T))] attribute.

[Copilot]

Pull request overview

Adds HC0096 support for the legacy [ExtendObjectType(typeof(T))] form so the analyzer can recommend the newer [ObjectType<T>] pattern alongside the existing generic-attribute path.

Changes:

• Extend ExtendObjectTypeAnalyzer to detect non-generic ExtendObjectType(typeof(...)) usage.
• Update the code fix and HC0096 message text to target the unified [ObjectType<T>] upgrade path.
• Add analyzer snapshot coverage for typeof(...) and string-based ExtendObjectType usages, and refresh existing snapshots.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/HotChocolate/Core/test/Types.Analyzers.Tests/ExtendObjectTypeAnalyzerTests.cs	Adds analyzer tests for typeof(...) and string overloads.
src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/ExtendObjectTypeAnalyzerTests.MixedAttributes_OnlyRaisesInfoForExtendObjectType.md	Updates expected HC0096 message text.
src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/ExtendObjectTypeAnalyzerTests.ExtendObjectType_WithTypeArgument_RaisesInfo.md	Adds new snapshot for typeof(...) diagnostic coverage.
src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/ExtendObjectTypeAnalyzerTests.ExtendObjectType_WithStringArgument_NoInfo.md	Adds new snapshot for string-overload no-diagnostic coverage.
src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/ExtendObjectTypeAnalyzerTests.ExtendObjectType_WithGenericType_RaisesInfo.md	Updates expected HC0096 message text.
src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/ExtendObjectTypeAnalyzerTests.ExtendObjectType_MultipleClasses_RaisesInfoForAll.md	Updates expected HC0096 message text for multiple diagnostics.
src/HotChocolate/Core/src/Types.Analyzers/ExtendObjectTypeCodeFixProvider.cs	Adds code-fix conversion for ExtendObjectType(typeof(T)).
src/HotChocolate/Core/src/Types.Analyzers/ExtendObjectTypeAnalyzer.cs	Adds analyzer logic for non-generic typeof(...) attributes.
src/HotChocolate/Core/src/Types.Analyzers/Errors.cs	Simplifies HC0096 diagnostic wording for both forms.

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