IMPROVE: Add new Option to NOT push the version tag

[DanielHabenicht]

Add a configuration option to prevent the automatic push of the current version tag.
Instead just use the additionalTags

Draft:

...
 "prepare": {
    "path": "@iteratec/semantic-release-docker",
    "additionalTags": ["test", "demo"],
    "imageName": "my-image",
    "registryUrl": "my-private-registry:5678",
    "respositoryName": "my-repository",
    /* New optional parameter, default value: true */
    "pushVersionTag": false
  },
...

PS: I will provide a PR shortly.

[cmurczek-it]

Could you describe a scenario in which you would use the plugin to version the image, but then decide not to publish the version? At the moment I can't think of one...

If we add this, it would be a new feature of the plugin so there should be a feat commit in the PR.

[DanielHabenicht]

My use case is caching during the release, like here:

https://github.com/DanielHabenicht/phonebook/blob/5246197fb74d0f09cfe75351bb63a0cfbc0eef3f/Phonebook.Frontend/.releaserc.json#L40-L45

In order to not push the builder image with each version but just one tag