Pull requests trigger the Java CI workflow even though it's limited to master push

[shai-almog]

When submitting a new PR github actions correctly runs pr.yml labeled as "PR CI". But it also runs "Java CI" (ant.yml) which shouldn't be run as it's marked to only run on push to master. This creates a sense that a PR isn't passing CI and wastes CI resources. The CI fails because secrets aren't available to pull requests.

[ryotabs]

Hi, I'd like to work on this if it hasn't been taken care of already. Could I get it assigned to me?

[shai-almog]

I'm not sure if this is still happening.