Some actions do not build with prometheus - adding prometheus tests
fails the jobs
cmake build tests did not run due to different target folder (while
reporting success) - now the bin folder is detected
Fixes#1533 and #1534
Memsetting `turn_params.default_users_db` before reading conf file, not
after.
Because auth is read in first iteration so secret was wiped out.
# test plan
Add new test script that uses config file to setup turnserver instead of
cli arguments and confirm it works (fails without the change)