Send post-commit funnels to analytics configurator

What does this MR do and why?

• Triggers a new worker when a commit is pushed, only if product analytics is enabled for a repository.
• Parses any created or changed defined funnels and sends them to the analytics-configurator.

MR acceptance checklist

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Before	After

How to set up and validate locally

• Ensure Product Analytics is set up and configured for any project.
  • Ultimate licence is required.
• Ensure the latest version of the analytics-configurator is running in your local Devkit.
• Create a new file in the repository called .gitlab/analytics/funnels/completed_purchase.yaml with the following contents.

name: Completed Purchase
seconds_to_convert: 3600
steps:
  - name: view_page_1
    target: '/page1.html'
    action: 'pageview'
  - name: view_page_2
    target: '/page2.html'
    action: 'pageview'

• When committed, check your sidekiq logs for SyncFunnelsWorker and check that it has executed successfully.
• Also check the logs for the analytics-configurator to see if there was a successful call to POST "/funnel-schemas"

Related to #438035 (closed)