Support Carthage xcframework

[shimastripe]

WHY

• Carthage 0.38.0 supports--use-xcframeworks option.
• XCFramework resolves to Carthage Xcode 12 workaround.

WHAT

• Fix missing xcode paths in GitHub Actions
  • https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md
  • macOS-latest pre installs Xcode 13.2.1
• Remove Carthage workaround and use --use-xcframeworks option.

[shimastripe]

@garrettmoon This PR supports PINOperation XCFramework. I'd like to continue to support for PINCache / PINRemoteImage. Could you please check it?

[garrettmoon]

I don't know why the checks didn't run on your PR… Do these changes reflect what you wanted? https://github.com/pinterest/PINOperation/pull/47

[shimastripe]

@garrettmoon It's ok! Thank you. And I commented nits point. https://github.com/pinterest/PINOperation/pull/47#pullrequestreview-1191029482