Add os environment option to enable remote jvm debugging

[jdye64]

This closes #361

[codecov-commenter]

Codecov Report

Merging #363 (ad769f2) into main (7d71d7e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #363   +/-   ##
=======================================
  Coverage   95.56%   95.57%           
=======================================
  Files          67       67           
  Lines        2933     2935    +2     
  Branches      547      547           
=======================================
+ Hits         2803     2805    +2     
  Misses         79       79           
  Partials       51       51           

Impacted Files	Coverage Δ
dask_sql/java.py	100.00% <100.00%> (ø)

---

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 7d71d7e...ad769f2. Read the comment docs.