build_testapps.py suppresses Dynamic Links on tvOS

[DellaBitta]

Description

Provide details of the change, and generalize the change in the PR title above.

TLDR; Instead of fixing the build matrix in our workflows, which is quite rigid across all targets, this change updates the build_testapps.py to suppress its build of Dynamic Links even if its passed in as one the provided targets on tvOS.

The Unity SDK build workflow supplies the Integration tests workflow with the full list of SDKs to test against as part of the nightly build process. This has traditionally been fine since all our SDKs were supported by all build targets.

However, tvOS doesn't support Dynamic Links. When fed the entirety of SDKs as build targets the build_testapps.py script would build the testapp a tvOS Dynamic Links testapp. The resulting artfiact would be a shell of an application with the C# definitions (as they're shared across tvOS and iOS in the .dlls) but with no C++ implementation. The test_simulator.py script would then find this errant testapp and blindly attempt to run it. However, the testapp would error-out upon execution due to the lack of C++ symbols.

This change suppresses the build of the Dynamic Links test app in build_testapps.py. With no testapp built, test_simualtor.py is ignorant of the fact that one test is missing, and runs all of the others successfully.

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Testing

Describe how you've tested these changes.

Integration Test CI

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Type of Change

Place an x the applicable box:

• Bug fix. Add the issue # below if applicable.
• New feature. A non-breaking change which adds functionality.
• Other, such as a build process or documentation change.

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