[WIP] Workflow configuration panel during upload

[ferishili]

This PR fixes #1407,

• REFACTORED: We now use /api/workflow-definitions endpoint in OpencastApi instead of /workflows for two reasons:

  1. As LMS and external application we have to use /api/*** as much as possible!
  2. the result from /workflow endpoint is much harder to work with that /api/workflow-definitions

• Add a column to workflow table to store the config panel json in string

• Admin can de- activate the feature in server specific settings.

• In upload dialog, we now have a new section in which the config panel json are complied filtred and displayed.

• User defined workflow configuration will now be sent over via Ingest to the Opencast!

[WIP] more changes as stated in: #1410 (comment)

[ferishili]

UPDATE:
There will be more changes regarding further configuring every upload workflow config panel item in the admin settings of the plugin:

• a section under the Standard Workflow will be provided, containing the list of configuration panel items of upload workflow selected and these will be reactive!
• Each item will get a checkbox with the intetion of displaying or hidding it from the upload dialog.
• Each item will have the I18N input field in order to get specific labeling for specific lanuage
  • The I18N input field has to be imported into SOCP, something like: resources/vue/components/I18nTextarea.vue

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.