Relax permissions on non-release pipeline jobs

[sxa]

If a non-authorized user looks at https://ci.adoptium.net/job/build-scripts/ they cannot see the non-weekly pipelines such as openjdk21-pipeline or the evaluation equivalent. This makes it harder for the casual user to be able to investigate potential issues with our build executions.

I believe these restrictions were put in historically in order to prevent non-beta builds from being made available to the public, in line with our labelling requirements.

Since we are using separate release pipelines now that restriction on the regular ones is no longer required, so we should be able to re-enable public visibility of those jobs.

[sxa]

FYI @andrew-m-leonard after the discussion a few days ago on this topic