Missing `Metatdata` api implementation

[hsebouai]

Right now the library does not expose the Metadata api call like documented in here

[DoubleDPro]

In work

[DoubleDPro]

@jmini Metadata was introduced in Gitlab Version 15.6.0. So we need to change version of Gitlab in integration tests. It required a lot of changes in integration tests and util classes. Can I make PR without updating version of Gitlab in IT and without integration testing of MetadataApi? I checked it in my branch on new version and it work fine! I want to create new issue to update version of Gitlab. What do you think?

[jmini]

Yes you can create the PR without integration tests.

[jmini]

About integrations test, there is an open discussion to change the setup: #925

I am fine with a temporary solution where the version would be updated with the current infrastructure.

[DoubleDPro]

@jmini I made PR. Can you check it?