Propagate dSYM bundles discovered within imported dynamic xcframeworks

[aaronsky]

Fixes #2512

This PR attempts to add automatic dSYM imports per target-triple for dynamic xcframeworks. It is a rough implementation with some appropriately sharp edges, due to my still-nascent familiarity with the codebase, but I've managed to prove it out at the day job. Hopefully this is acceptable!

For example, given a dependency on Sentry's dynamic xcframework, which vends dSYMs:

bazel cquery --output=files --output_groups=+dsyms --apple_generate_dsym //examples/ios/HelloWorldSwift

Before

bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.ipa
bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.app.dSYM/Contents/Resources/DWARF/HelloWorldSwift
bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.app.dSYM/Contents/Info.plist

After

bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.ipa
bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.app.dSYM/Contents/Resources/DWARF/HelloWorldSwift
bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.app.dSYM/Contents/Info.plist
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64_x86_64-simulator/dSYMs/Sentry.framework.dSYM/Contents/Info.plist
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64_x86_64-simulator/dSYMs/Sentry.framework.dSYM/Contents/Resources/DWARF/Sentry
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64_x86_64-simulator/dSYMs/Sentry.framework.dSYM/Contents/Resources/Relocations/aarch64/Sentry.yml
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64_x86_64-simulator/dSYMs/Sentry.framework.dSYM/Contents/Resources/Relocations/x86_64/Sentry.yml

After (ios_arm64)

bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.ipa
bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.app.dSYM/Contents/Resources/DWARF/HelloWorldSwift
bazel-out/ios_sim_arm64-fastbuild-ios-sim_arm64-min15.0-applebin_ios-ST-048b4cf12fed/bin/examples/ios/HelloWorldSwift/HelloWorldSwift.app.dSYM/Contents/Info.plist
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64/dSYMs/Sentry.framework.dSYM/Contents/Info.plist
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64/dSYMs/Sentry.framework.dSYM/Contents/Resources/DWARF/Sentry
examples/ios/HelloWorldSwift/Sentry-Dynamic.xcframework/ios-arm64/dSYMs/Sentry.framework.dSYM/Contents/Resources/Relocations/aarch64/Sentry.yml

Note: dSYMs for dynamic xcframeworks imported from outside the root module are not copied into bazel-out and their paths as viewed with cquery are under external/ relative to the output base. This is consistent with how dsym_imports are handled by apple_dynamic_framework_import.

[luispadron]

This seems good to me but im also no expert here. The test looks good though and generally like some of the refactoring that was done.

Could we update the PR description/commit to go into more details, potentially show-casing an example with expected inputs/outputs. I think that would help make things more understandable.