depr(python): Rename from_repr parameter from tbl to data

[stinodego]

Just something super minor I ran into while working on the code in this module. There are probably very few people using this parameter name directly as a keyword argument.

tbl isn't really in line with the naming conventions we usually use (write out the words in full). Also, when it's a Series, 'table' doesn't make much sense.

Better to just use data as a parameter name, matching all other from_x functions. It's just data in a specific format.

I also moved it some lines down the module because it's not as important as other functions like from_pandas etc.

[codecov]

Codecov Report

Attention: Patch coverage is 82.27848% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 81.18%. Comparing base (83c3fb0) to head (5d756a3).

Files	Patch %	Lines
py-polars/polars/convert.py	82.27%	6 Missing and 8 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15156      +/-   ##
==========================================
- Coverage   81.18%   81.18%   -0.01%     
==========================================
  Files        1347     1347              
  Lines      175431   175433       +2     
  Branches     2506     2506              
==========================================
- Hits       142426   142423       -3     
- Misses      32524    32530       +6     
+ Partials      481      480       -1     

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