[TF-M] TF-M CI Coverity changes

Hi all,

We are considering moving the TF-M Coverity scan (the results from https://ci.trustedfirmware.org/view/TF-M/job/tf-m-coverity/) to a private instance.

I am sending this out to find out if anyone who is external to Arm uses these results, or would like to see the results in the future. If there is interest in keeping the public one working then we can have both the private and public ones running alongside each other to keep the results visible.

Please let me know if you are a user of the current Coverity system, or wish to be able to view the results in the future so the jobs can be configured accordingly. If no interest is shown then the Coverity scan will be switched over to only the private instance.

Thanks, Matt Dalzell - Arm