ci: add QA TOOLS parameters and periodicity to Code Coverage

- Enable parameters on Hafnium code coverage job to select
different QA TOOL repo and/or branch.
- Execute the Hafnium Code Coverage job once a week.

Signed-off-by: Saul Romero <saul.romero@arm.com>
Change-Id: I57c9c45e1b7a92ad70e1098e45689bbdb8d3a772
1 file changed