Upgrade cluster applications, starting with runner

What does this MR do?

1. Adds ability to upgrade cluster applications

Re-uses the same services used to install a cluster application to also upgrade a cluster application. This is possible as helm allows installation and upgrade to both use helm upgrade --install.

This allows for the following new transitions:

• a successful upgrade: installed -> scheduled -> updating -> installed updated
• a failed upgrade: installed -> scheduled -> updating -> update_errored.

cf. successful installation is installable -> scheduled -> installing -> installed.

2. Allow in the Frontend to upgrade the runner application

Other changes:

• Changes InstallCommand to use helm upgrade --install.
• Adds Clusters::Application::UpgradeService where the state transition needed to be scheduled -> updating.

What are the relevant issue numbers?

• https://gitlab.com/gitlab-org/gitlab-ce/issues/49384
• https://gitlab.com/gitlab-org/gitlab-ce/issues/56524

Tasks

• Only allow upgrades if version != VERSION ?
• [-] Show what version was attempted in error message ?
• Test new transitions
• Update version column after update complete - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24810

Manual QA test

• Install runner
• Upgrade runner via UI (re-enabled Install button via Chrome Dev tools and hit button)
• Upgrade runner via rails console - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24789#note_136426318
• Check Prometheus alerts still works - https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9483#note_139063962

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [-] Documentation created/updated via this MR
• [-] Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• [-] Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• [-] Conforms to the database guides
• [-] Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer