Make Che Theia release script non-interactive

[azatsarynnyy]

Is your task related to a problem? Please describe.

We need to make Che Theia release script non-interactive to use it within the automated Che release process.

Describe the solution you'd like

Che Theia release script asks all the required parameters interactively, e.g.:

Do you want to change branch in 'che-theia-init-sources.yml'? [Y/n] <Enter>
Enter branch name: 7.7.x
Enter Theia version : 0.15.0-next.15995cd0
Enter che-theia image tag [latest]: <Enter>
Enter Theia branch name [v0.15.0-next.15995cd0]: master
Enter Theia git refs [refs\/tags\/v0.15.0-next.15995cd0]: refs\\\\\\\\\\/heads\\\\\\\\\\/master
Enter che-theia image version [0.15.0-next.15995cd0]: 7.7.0
Do you want to update extension/plugin version with '7.7.0'? [Y/n] <Enter>

It should be possible to execute it in non-interactive mode, e.g.:

./make-release.sh --repo git@github.com:eclipse/che-machine-exec --version 7.7.1 --trigger-release

There're also several manual steps have to be automated:
https://github.com/eclipse/che-theia/blob/master/RELEASE.md#the-release-changes-to-depend-on-theia-commit

Describe alternatives you've considered

Additional context