Fix Testing.framework rsync exclusion

[louwers]

This seems like a real issue. See the diff, it's a small patch.

GPT 5.6 wrote the text below.

What does this change?

Remove the trailing comma from the Testing.framework entry in the Bash array used to generate rsync exclusions.

The comma is currently emitted as part of the filename:

/*.app/Frameworks/Testing.framework,

That pattern does not exclude the real Testing.framework. The Bazel output-copy script can consequently run rsync --delete against the framework while Xcode is copying it into a test host, causing timing-dependent build failures.

Observed failures include a missing Testing.framework/Info.plist and unlinkat: Directory not empty:

https://github.com/maplibre/maplibre-native/actions/runs/29261436369/job/86881585165?pr=4146

Downstream workaround PR: maplibre/maplibre-native#4402

Validation

• bazel run //:buildifier.check
• bazel build //xcodeproj/internal/bazel_integration_files:rsync_excludes
• Confirmed the generated app exclusions contain Testing.framework without a trailing comma for both framework locations