fix: handle text as categoricals if sensitive=True

[alexbarros]

fixes #1377
Handles text variables as categoricals if sensitive is true. Here is an example of a column with random text:

sensitivity = False:

sensitivity = True

[codecov-commenter]

Codecov Report

Patch coverage: 79.83% and project coverage change: -0.01% ⚠️

Comparison is base (d8c3104) 89.70% compared to head (745c4d0) 89.69%.
Report is 9 commits behind head on develop.

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1415      +/-   ##
===========================================
- Coverage    89.70%   89.69%   -0.01%     
===========================================
  Files          194      194              
  Lines         6254     6260       +6     
===========================================
+ Hits          5610     5615       +5     
- Misses         644      645       +1     

Flag	Coverage Δ
py3.8-ubuntu-22.04-pandas	89.69% <79.83%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
setup.py	0.00% <ø> (ø)
src/ydata_profiling/model/pandas/__init__.py	100.00% <ø> (ø)
tests/unit/test_describe.py	94.54% <ø> (ø)
tests/unit/test_output.py	100.00% <ø> (ø)
src/ydata_profiling/profile_report.py	81.42% <50.00%> (ø)
src/ydata_profiling/visualisation/plot.py	78.92% <59.37%> (ø)
...g/report/structure/variables/render_categorical.py	94.50% <66.66%> (-0.95%)	⬇️
..._profiling/model/pandas/timeseries_index_pandas.py	76.19% <76.19%> (ø)
src/ydata_profiling/model/timeseries_index.py	83.33% <83.33%> (ø)
src/ydata_profiling/report/structure/overview.py	93.33% <91.30%> (ø)
... and 6 more

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