Set a 4 hours timeout for the `package-and-qa` job
The package-and-qa
job is currently often timing out, as can be seen in https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/10520#note_382471416.
As a temporary measure, we should increase the job's timeout to 4 hours, and run the job on the prm
runners, as shown in https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/10520#note_390175264.