generator: Use Swift 6.2 by default

[euanh]

No description provided.

[euanh]

@swift-ci test

[xtremekforever]

Easy enough, however do you want to add 6.2 to the E2E matrix?

[MaxDesiatov]

I concur, this deserves to include an addition to Tests/SwiftSDKGeneratorTests/EndToEndTests.swift

[Joannis]

@euanh did you see the above comments?

[euanh]

@swift-ci test

[euanh]

@swift-ci test

[euanh]

Thanks @Joannis

@MaxDesiatov I've updated the tests. There's a lot of duplication now and we should try to reduce it.

• In Bump swift-tools-version to 6.0 #237 you mentioned that we're no longer directly testing 5.9 and 5.10: shall we drop the end to end tests for those versions as well?
• If we merge Bump swift-tools-version to 6.0 #237, we should translate the end to end tests to swift-testing parameterised tests.
  I'd prefer to merge this PR as-is and make those changes in their own PRs.