www/srt: Update to 1.5.5 and enable "make test"
- Enable "make test", depends on devel/googletest and using -std=c++17
- Disable running unit tests in parallel due to race conditions
- Remove option to compile with no encryption (defeats the point of the library)
- Remove HEAVY_LOGGING option, rely on the framework instead
Changelog: https://github.com/Haivision/srt/releases/tag/v1.5.5
PR: 295356
Approved by: maintainer timeout, 2+ weeks