C# 14: [TEST ONLY] Simple lambda parameters with modifiers.

[michaelnebel]

In this PR we add tests for modifiers for implicitly typed lambda parameters. Prior to C# 14, it was only possible to use modifiers for explicitly typed lambda parameters. The feature is described here.
It turns out that the extractor and QL library supports this out-of-the-box.

[Copilot]

Pull request overview

This PR adds comprehensive test coverage for C# 14's new feature that allows modifiers on implicitly typed lambda parameters. Previously, modifiers could only be used with explicitly typed lambda parameters, but C# 14 extends this capability to implicitly typed parameters as well. The PR confirms that the CodeQL extractor and QL library support this feature without requiring any code changes.

Changes:

• Added new test file LambdaParameterModifiers.cs with test cases for both explicitly and implicitly typed lambda parameters with various modifiers (ref, out, in, ref readonly, scoped ref, params)
• Updated ParameterModifiers.ql to include lambda parameters from the new test file
• Regenerated ParameterModifiers.expected with expected results for the new test cases

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
csharp/ql/test/library-tests/parameters/LambdaParameterModifiers.cs	New test file containing 11 lambda expressions demonstrating both explicitly and implicitly typed lambda parameters with all supported modifiers
csharp/ql/test/library-tests/parameters/ParameterModifiers.ql	Extended TestParameter class to include lambda parameters from the new test file
csharp/ql/test/library-tests/parameters/ParameterModifiers.expected	Regenerated expected results file containing entries for the 11 new lambda parameters with their respective modifiers