Update CMake settings to match recent package changes

stmontgomery commented 1 week ago

A few fixes to the CMake and package build settings:

Enable Swift 6 language mode, to match the package which now uses this language mode due to the change which bumped swift-tools-version to 6.0.
Add SourceLocation macro-related source files, which were missing.
Add fake visionOS 99.0 OS version to our _distantFuture availability definition.
Clean up experimental/upcoming features which are no longer needed.

[x] Code and documentation should follow the style of the Style Guide.
[x] If public symbols are renamed or modified, DocC references should be updated.

stmontgomery commented 1 week ago

@swift-ci please test

stmontgomery commented 1 week ago

@compnerd @jeffdav FYI about these adjustments to the CMake rules.

stmontgomery commented 1 week ago

@swift-ci please test

stmontgomery commented 1 week ago

@swift-ci please test

apple / swift-testing