additions to allow better object store connections and cypress tests

Another round of Thanos changes. These bring support for object stores and cypress tests to test the object store integration with monitoring.prometheus.

See bigbang run here with the latest test results: https://repo1.dso.mil/big-bang/bigbang/-/pipelines/2375411

https://repo1.dso.mil/big-bang/bigbang/-/jobs/27156687/artifacts/file/test-artifacts/thanos/cypress/videos/thanos-healthspec.js.mp4