Don't try to compress osm chunks

[svenklemm]

This patch filters out the osm chunk in the compression policy and adds some additional checks so we dont run compress_chunk on osm chunks.

[codecov[bot]]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (59f50f2) 80.06% compared to head (d17548e) 81.46%. Report is 12 commits behind head on main.

Files	Patch %	Lines
src/chunk.c	62.50%	1 Missing and 2 partials :warning:
tsl/src/compression/compression.c	0.00%	0 Missing and 2 partials :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6670      +/-   ##
==========================================
+ Coverage   80.06%   81.46%   +1.39%     
==========================================
  Files         190      190              
  Lines       37181    36392     -789     
  Branches     9450     9459       +9     
==========================================
- Hits        29770    29647     -123     
+ Misses       2997     2983      -14     
+ Partials     4414     3762     -652     

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