Provide `drop_empty_siblings` argument

[delucchi-cmu]

Change Description

Closes https://github.com/astronomy-commons/hipscat/issues/302 Closes #269

Solution Description

Adds drop_empty_siblings argument to binning calculation, as added in https://github.com/astronomy-commons/hipscat/pull/304.

Increases the default highest_order s.t. users are unlikely to need to change it, and clarifies behavior in the docstrings.

Code Quality

• [x] I have read the Contribution Guide and LINCC Frameworks Code of Conduct
• [x] My code follows the code style of this project
• [x] My code builds (or compiles) cleanly without any errors or warnings
• [x] My code contains relevant comments and necessary documentation

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.72%. Comparing base (8a34d62) to head (bd9eea8).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #357 +/- ## ======================================= Coverage 99.72% 99.72% ======================================= Files 26 26 Lines 1454 1456 +2 ======================================= + Hits 1450 1452 +2 Misses 4 4 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.