(jenkins-jobs) Allow customization of the "Discover origin pull requests" trait

What feature do you want to see added?

Code in

helm-charts/charts/jenkins-jobs/templates/_helpers.tpl

Lines 155 to 158 in 8800432

    
                       // Only Origin Pull Request 
        
                       gitHubPullRequestDiscovery { 
        
                         strategyId(1) // 1-Merging the pull request with the current target branch revision 
        
                       }

is not customizable.

We want to specify jobs without origin's PR discovery (infra.ci: website deployments main deployment and infra-report PR main builds for instance)

Upstream changes

No response

Upstream changes

No response

	// Only Origin Pull Request
	gitHubPullRequestDiscovery {
	strategyId(1) // 1-Merging the pull request with the current target branch revision
	}