Enable map type in rel table

[benjaminwinger]

Already supported following the update to the rel table storage, but the exception checking that the previously unsupported types aren't used was still in place. Tests have been updated, though not exhaustively added for using the types in rel tables.

Fixes #2184

[ray6080]

Can you also add a test for COPY with MAP data type on rel tables? you can change one of MANY_MANY in tinysnb. and also test SERIAL with COPY actually.

[ray6080]

Also, as we discussed, we don't support serial as a non-pk property for now. So you might need to revert the check on serial on rel table, or you can solve this by supporting it all at once if you want.

[benjaminwinger]

I clearly missed the part about serials not being supported as non-primary keys (reverted). But maps do seem to be working in rel tables when copying and inserting.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7e4e0ea) 93.37% compared to head (fcaa1a5) 93.38%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2584   +/-   ##
=======================================
  Coverage   93.37%   93.38%           
=======================================
  Files        1063     1063           
  Lines       39403    39402    -1     
=======================================
  Hits        36794    36794           
+ Misses       2609     2608    -1     

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