Refs #37785 - Race condition during container push

[sjha4]

What are the changes introduced in this pull request?

Updates:
Refactor container push root creation into it's own action.
Acquire lock on product when saving container push root and repository.

Considerations taken when implementing this change?

Acquiring lock on product before saving root and repo makes sure only one worker can run the save! at a time even if we have multiple workers starting the create_root task at the exact same time.

What are the testing steps for this pull request?

What are the testing steps for this pull request?

Push a container image to katello.

podman pull quay.io/prometheus/busybox
podman login `hostname`
podman image list
podman push <img_id> `hostname`/default_organization/<product_label>/<container_name>

Try multiple times till you see the race condition happen. It might take a few attempts to reproduce this.
On this branch, you shouldn't see the race condition causing a container push failure. You may see a logger statement when the race condition happens and the push should proceed as normal afterwards.

[ianballou]

This is working well so far, I haven't seen any related errors pop up yet. Just one organization question:

[ianballou]

Working well! Tested by pushing the same container content to many new repositories.