docs(enabledManagers): added list of possible managers, removed references to docker and node (#4594)

chore(docs): fix link to crates.io

This commit adds (back) support for GitLab's 'merge when pipeline succeeds'
feature. This feature needs to be enabled by bot owners explicitely because
of an possible race condition in current GitLab versions.

Closes #3265

This reverts commit 0228bd05.

Fixes test problem on WSL

The extraction logic failed to extract the GitLab URI correctly
when the configured platform endpoint does not have a trailing
slash. This commit changes the logic to handle scenarios with
and without trailing slash

Fixes #4270