util/util-logging: Add Scala3 cross-build

[felixbr]

This adds Scala3 cross-buliding for the module util-logging as discussed in #290

[codecov-commenter]

Codecov Report

Merging #295 (23767e6) into develop (91551dc) will not change coverage. The diff coverage is 80.00%.

@@           Coverage Diff            @@
##           develop     #295   +/-   ##
========================================
  Coverage    52.62%   52.62%           
========================================
  Files          316      316           
  Lines        16864    16864           
  Branches      1035     1045   +10     
========================================
  Hits          8875     8875           
  Misses        7989     7989           

Impacted Files	Coverage Δ
...g/src/main/scala/com/twitter/logging/Handler.scala	47.05% <0.00%> (ø)
...c/main/scala/com/twitter/logging/FileHandler.scala	82.97% <100.00%> (ø)
...ng/src/main/scala/com/twitter/logging/Logger.scala	61.29% <100.00%> (ø)
...in/scala/com/twitter/logging/QueueingHandler.scala	93.75% <0.00%> (-6.25%)	:arrow_down:
util-core/src/main/scala/com/twitter/io/Buf.scala	93.27% <0.00%> (+0.35%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 91551dc...23767e6. Read the comment docs.

[felixbr]

Not sure why com.twitter.app.AppTest is failing (different module and works locally), might be a flaky test.

[felixbr]

I rebased the PR onto develop, removed the now unnecessary .toLong conversion, and fixed one more deprecation warning regarding Scala 3.

I think the PR can now be merged, if you like. 🙂

[joybestourous]

Merged! b8a30a7