Updating dispatcher to use branch=master for smoke_capella:rbac job

Change-Id: I0f74f0e931235dada10e6a124a6ecc7f76a9fcff
Reviewed-on: https://review.couchbase.org/c/testrunner/+/244608
Tested-by: <vishal.jain@couchbase.com>
Reviewed-by: <vishal.jain@couchbase.com>

Author: ashwin2002

scripts/testDispatcher.py

@@ -974,6 +974,11 @@ def main():
                             # If nothing matches, fallback to default slave
                             slave_to_use = "deb12_P0_slave"
 
+                if (options.launch_job == 'test_suite_executor_cloud'
+                        and testsToLaunch[i]['component'] == 'smoke_capella'
+                        and testsToLaunch[i]['subcomponent'] == 'rbac'):
+                    branch_to_trigger = 'master'
+
                 url = launchString.format(options.version,
                                             testsToLaunch[i]['confFile'],
                                             descriptor,