be able to exclude PR set list from build

[Ginxo]

Let's suppose we want to build either a branch or a PR set and we want to exclude a list of specific PR urls, like I want to build main branch for https://github.com/kiegroup/kie-wb-distributions but I want to exclude already merged PRs for it like

• RHPAM-4387 xml-apis:xml-apis excluded kie-wb-distributions#1169
• JBPM-10090 curl access to business central ends in HTTP Status 405 - … kie-wb-distributions#1166

Things to consider:

• target branch from excluded PRs has to match either the branch to build or the target branch from PR url to build
• the PR url to exclude could be from specific project to build or could be from any project in the chain
• this functionality should be available just from CLI with a new argument like excludedPRs (or any better idea)