Fix workhorse endpoint exclusions

I don't believe I have access to dashboards.gitlab.net to generate an example of the new dashboards... Enlighten me if I should have access!

We've realised via this incident: https://gitlab.com/gitlab-com/gl-infra/gitlab-dedicated/incident-management/-/issues/178 That the git endpoints that should be excluded are in fact still included in the apdex calculation.

For get-hybrid, I've updated the strings representing these endpoints to match what we actually find via PromQL, which do not match the current strings.

For .com, I've only added those new strings in order to minimise the risk of breaking any existing alerting.

For each new string, I've added a comment with the string we see in the dashboards or any PromQL queries.