Merge changes from topic "rss_rse_rename" into integration

* changes:
  refactor(changelog): change all occurrences of RSS to RSE
  refactor(qemu): change all occurrences of RSS to RSE
  refactor(fvp): change all occurrences of RSS to RSE
  refactor(fiptool): change all occurrences of RSS to RSE
  refactor(psa): change all occurrences of RSS to RSE
  refactor(fvp): remove leftovers from rss measured boot support
  refactor(tc): change all occurrences of RSS to RSE
  docs: change all occurrences of RSS to RSE
  refactor(measured-boot): change all occurrences of RSS to RSE
  refactor(rse): change all occurrences of RSS to RSE
  refactor(psa): rename all 'rss' files to 'rse'
  refactor(tc): rename all 'rss' files to 'rse'
  docs: rename all 'rss' files to 'rse'
  refactor(measured-boot): rename all 'rss' files to 'rse'
  refactor(rss): rename all 'rss' files to 'rse'