feat(logs): configure log format

[aali309]

fixes: #39

[github-actions]

ARCH	IMAGE
amd64	ghcr.io/cryostatio/cryostat-core:pr-322-d4b589f884cb877dc2ff2bad9acdff09bf9e9e23-linux-amd64
arm64	ghcr.io/cryostatio/cryostat-core:pr-322-d4b589f884cb877dc2ff2bad9acdff09bf9e9e23-linux-arm64

To run smoketest:

# amd64
CRYOSTAT_IMAGE=ghcr.io/cryostatio/cryostat-core:pr-322-d4b589f884cb877dc2ff2bad9acdff09bf9e9e23-linux-amd64 sh smoketest.sh

# or arm64
CRYOSTAT_IMAGE=ghcr.io/cryostatio/cryostat-core:pr-322-d4b589f884cb877dc2ff2bad9acdff09bf9e9e23-linux-arm64 sh smoketest.sh

[andrewazores]

/build_test

[andrewazores]

I'm not sure this is quite the right approach - rather than the configuration only allowing for booleans of whether information should be included in the output or not, it would be more flexible and more conventional to use formatting specifiers, so the configuration should be set as ex. an environment variable that looks like LOG_FMT="[%t] (%l) %m", where %t would be replaced by the timestamp, %l by the log level, %m by the log message, for example. This way it is a configuration time change, rather than something that must be done by changing source code and rebuilding, too.

Regardless, this is a pretty low priority request - it has been open for 3.5 years and hasn't really been a real problem, so I would rather we focus our efforts on more immediately fruitful development :-)

[github-actions]

Cryostat Test: All tests pass ✅
https://github.com/cryostatio/cryostat-core/actions/runs/7254110638