We're promoting the winning candidate of the experiment called
change_continuous_onboarding_link_urls experiment. With exception
of the pipeline link the changed URLs proved to increase engagement
with our product.

Implementation notes:

- We are moving part of the action items to paths now dependent on the
  project that will passed to the LearnGitlabHelper. It no longer needs
  issue IDs for those new paths.

- Clean up for experiment: change_continuous_onboarding_link_urls
  Make the URLs from the experiment candidate the new normal with
  exception of the pipeline link.

- Remove openInNewTab attribute for securityScanEnabled

- By promoting the change_continuous_onboarding_link_urls experiment
  the securityScanEnabled action no longer has a documentation URL
  and doesn't need to open in a new tab anymore.
  (Sidenote this experiment was making it inconsistent for the candidate
  since it wasn't a documentation link anymore, since adding the
  openInNewTab attrbute)

- LearnGitlabSectionLink now accepts the openInNewTab as a prop as well
  as the configuration in the constant. This means it can be passed down
  from the backend without needing to edit the config.

- Remove the config file for the experimental feature flag
  change_continuous_onboarding_link_urls

- Remove artifacts from change_continuous_onboarding_link_urls
  experiment from components, specs, and snapshots.

- refs:
  https://gitlab.com/gitlab-org/gitlab/-/issues/349804
  https://gitlab.com/gitlab-org/gitlab/-/issues/352066
  https://gitlab.com/gitlab-org/gitlab/-/issues/352066
  https://gitlab.com/gitlab-org/gitlab/-/merge_requests/80906#note_865463051
  https://gitlab.com/gitlab-org/gitlab/-/merge_requests/80906#note_865577627

Changelog: changed