Clarify some rule titles

[meziantou]

Summary

MA0032 is broader than MA0040 because it still reports when no CancellationToken is available in scope. The old title did not make that distinction clear, which made the two rules easier to confuse when scanning the rule list.

This renames MA0032 to Use an overload with a CancellationToken argument, even when no token is available in scope and updates the generated rule documentation and packaged editorconfig entries to match.

Notes

• The underlying analyzer behavior is unchanged.
• This is a naming and documentation clarity update only.

Validation

• Ran UseAnOverloadThatHasCancellationTokenAnalyzerTests
• Ran UseAnOverloadThatHasCancellationTokenAnalyzerTests with /p:RoslynVersion=roslyn4.2