[xccov-improvements] - Added an early fail if file cannot be found fo…

[Tyler-Keith-Thompson]

…r coverage - TT

Linked Issue:

Checklist:

• [ ] Is the linter reporting 0 errors?
• [ ] Did you comply with our styleguide?
• [ ] Is there adequate test coverage for your new code?
• [ ] Does the CI pipeline pass?
• [ ] Is the static analysis tool reporting 0 issues?
• [ ] Did you update the documentation?
• [ ] Did you update the sample app?
• [ ] Do we need to increment the minor/major version?
• [ ] Did you change the public API?
• [ ] Have you done everything you can to make sure that errors that can occur are compile-time errors, and if they have to be runtime do you have adequate tests and documentation around those runtime errors? For more details.

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If Applicable:

• [ ] Did you test when the first item is skipped?
• [ ] Did you test when the last item is skipped?
• [ ] Did you test when middle items are skipped?
• [ ] Did you test when incorrect data is passed forward?
• [ ] Did you test proceeding backwards?

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If Public API Has Changed:

• [ ] Did you deprecate (rather than remove) any old methods/variables/etc? Our philosophy for deprecation.
• [ ] Have you done the best that you can to make sure that the compiler guides people to changing to the new API? (Example: the renamed attribute)
• [ ] If necessary, have you tested the upgrade path for at least N-1 versions? For example, if data persists between v1 and v2 then that upgrade should be tested and as easy as we can make it.

[Tyler-Keith-Thompson]

Just a quick update to the sonarcloud script so that it actually gives useful output if the xcresult cannot be found for some reason.

[Tyler-Keith-Thompson]

An example of this giving valuable feedback

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!

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