WIP feat(reports): reports sidecar, configurable caching

[andrewazores]

Based on #62
Depends on #62

Reimplements sidecar report generation using a cryostat-reports instance and implements two tiers of caching:

• in-memory caching using Caffeine caches for both active and archived reports. Active report cache entries expire shortly after write, archived report cache entries expire after a longer time and after read.
• S3 caching for archived reports. These persist until the source archived recording is deleted through the Cryostat API, and also have an S3 expiration of 1 day after creation.

TODO: after rebasing, the in-memory active recording cache doesn't seem to expire on a timer, it just always returns cached entries.

[github-actions]

This PR/issue depends on:

• feat(recordings): implement active recording downloading #62
  By Dependent Issues (🤖). Happy coding!