docs: Ignore prettier formatting for generated tables

[andygrove]

Which issue does this PR close?

N/A

Rationale for this change

Running make regenerates configs.md without prettier formatting, resulting in a local diff that will fail CI if pushed and requires the user to run prettier as well.

Another issue is that after this process, the diff does not clearly show which config was added or removed, because the entire table gets rewritten.

This PR adds prettier tags around tables to turn off linting for those sections.

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.27%. Comparing base (f09f8af) to head (f677325).
⚠️ Report is 706 commits behind head on main.

Files with missing lines	Patch %	Lines
...src/main/scala/org/apache/comet/GenerateDocs.scala	0.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2790      +/-   ##
============================================
+ Coverage     56.12%   58.27%   +2.15%     
- Complexity      976     1422     +446     
============================================
  Files           119      157      +38     
  Lines         11743    14122    +2379     
  Branches       2251     2365     +114     
============================================
+ Hits           6591     8230    +1639     
- Misses         4012     4701     +689     
- Partials       1140     1191      +51     

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[wForget]

Thanks @andygrove