Simplify health check to ignore response

[nolancon]

Description of your changes

Previously, the health check was a HTTP Get request to the hostBase address - however this equates to a ListBuckets S3 call on RGW. As such, a situation can arise where the request may not be authorized, resulting in a 403 error. This makes checking the response or response code a bit redundant.

Instead, this PR simplifies the health check to simply establish a connection with the hostBase address - if an error occurs or a connection cannot be made, then the health check will be deemed a failure, otherwise it is considered successful and the backend is marked as healthy.

I have:

• Run make reviewable to ensure this PR is ready for review.
• Run make ceph-chainsaw to validate these changes against Ceph. This step is not always necessary. However, for changes related to S3 calls it is sensible to validate against an actual Ceph cluster. Localstack is used in our CI Chainsaw suite for convenience and there can be disparity in S3 behaviours betwee it and Ceph. See docs/TESTING.md for information on how to run tests against a Ceph cluster.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

• Unit tests edited
• Manually checked
• e2e suites make chainsaw and make ceph-chainsaw both passing.