Release: push the module to the registry as the part of the release

[Tomasz-Smelcerz-SAP]

Description

We should have the module pushed to the registry as the part of the release.
URL: europe-west3-docker.pkg.dev/sap-kyma-jellyfish-dev/template-operator:<version>

AC:

• module pushed as the part of the release
• modulectl and ocm versions taken from versions.yaml - preferably the same as in the lifecycle-manager

Reasons

For now we don't have this procedure automated or even described. When releasing a new template-operator version, module push has to be done manually. Many e2e/integration tests can be performance-optimized if we can use an already existing OCM artifact, instead of always building it locally. Besides that's the good test if our own tooling works as expected.