PYTHON-5195 Allow OCSP server to be run as a daemon

[blink1073]

Tested with mongodb/mongo-python-driver#2190: https://spruce.mongodb.com/version/67cc94d4b26dff000739c152/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC

and the C driver: https://spruce.mongodb.com/version/67ced2d64d80c40007a73649/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC

Uses waitress to create a production flask server that can be run as a daemon on all platforms.
Adds tests for OCSP server on Mac, Windows, and RHEL.

[jmikola]

Adds tests for OCSP server on Mac, Windows, and RHEL

@blink1073: I noted that this wasn't tested on Debian 12 hosts, but are you aware of any workaround for the following error when launching the OCSP responder?

oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

See: PHPC task failure for more context.

I think this can be traced back to wbond/oscrypto#78 and there appear to be some suggested workarounds that depend on a specific commit since it looks like the fix has yet to be tagged.

If that's not feasible, I can look into switching our OCSP tasks over to a different platform.

[jmikola]

@blink1073: This removal is what appears to have caused the regression in PHPC. I noticed that this commit was mentioned in wbond/oscrypto#78 (comment) as a workaround for the upstream issue with oscrypto 1.3.0.

The original context for this change was #452, but it looks like we'd do well to include a comment here for future reference. Might be a good idea to reference the upstream issue.

[blink1073]

Hmm, I had removed the specific tag because I was seeing a warning from pip. I'll revert to use the tag.