[Bug-fix doc] Fix missing default values in code and doc, plus remove duplicate batch_size in a tutorial

[davebulaval]

This PR fixes:

• some missing default values in a tabular CTGAN module.
• some missing default values in the tutorial of those same models and cleans duplicate information for batch_size in TVAE.
• an error in the doc for the l2scale param type (what int when it is in fact a float).
• the Dictionary typo in the doc.

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Merging #784 (221acb0) into master (8d3d847) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #784   +/-   ##
=======================================
  Coverage   67.88%   67.88%           
=======================================
  Files          38       38           
  Lines        2868     2868           
=======================================
  Hits         1947     1947           
  Misses        921      921           

Impacted Files	Coverage Δ
sdv/metadata/table.py	76.80% <ø> (ø)
sdv/tabular/base.py	81.49% <ø> (ø)
sdv/tabular/copulagan.py	89.28% <ø> (ø)
sdv/tabular/copulas.py	88.07% <ø> (ø)
sdv/tabular/ctgan.py	77.77% <ø> (ø)
sdv/timeseries/base.py	0.00% <ø> (ø)
sdv/timeseries/deepecho.py	0.00% <ø> (ø)

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[npatki]

Hi @davebulaval, thanks for your contribution request. We have recently released the new, SDV 1.0 (Beta!), which contains a separate, dedicated docs site as well as demo notebooks. The codebase has also changed (visible on our SDV 1.0 branch). Given this, I'm closing off the PR as obsolete.

However, if you do notice any issues in the new documentation or tutorials, please feel free to file a new issue!