Remove pandas metadata in hipscat conversion

[delucchi-cmu]

Change Description

Pandas metadata uses the old _hipscat_id field. Instead of manipulating the pandas metadata to fit new columns, just remove from the parquet schema.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 99.00%. Comparing base (5717268) to head (ebb816d).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/hats_import/hipscat_conversion/run_conversion.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #413      +/-   ##
==========================================
- Coverage   99.06%   99.00%   -0.07%     
==========================================
  Files          29       29              
  Lines        1607     1609       +2     
==========================================
+ Hits         1592     1593       +1     
- Misses         15       16       +1     

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[github-actions]

Before [5717268] <v0.4.0>	After [aeb83c4]	Ratio	Benchmark (Parameter)
failed	failed	n/a	benchmarks.BinningSuite.time_read_histogram

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