fix: hafnium-acs job

Set default ACS branch to main instead of master.
Fix bash errors in run script.
Remove authorization setting, authorization is done based on github
groups.

Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: I9f4c5590ef04ed757df0be28e714d4da7c45fcb5
1 file changed