[TF-M] Release v1.8.0 changes are merged.

Hello,

The changes made for the TF-M v1.8.0 are merged back to the master branch.

To allow that, Corstone-1000 platform was temporarily excluded from OpenCI tests because the platform changes in the release branch conflicted with changes in the master, made in parallel. The platform will be back under test immediately after the conflict resolution.

Corstone-1000 platform builds and runs correctly under v1.8.0 tag.

Thanks, Anton