chore(🦾): bump python "flask-session==0.8.0"

[github-actions]

Updates the python "flask-session" library version.

Generated by @supersetbot 🦾

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 69.83%. Comparing base (a4c5446) to head (fb134db).

Files	Patch %	Lines
superset/config.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #27697      +/-   ##
==========================================
+ Coverage   69.78%   69.83%   +0.05%     
==========================================
  Files        1911     1911              
  Lines       75024    75024              
  Branches     8355     8355              
==========================================
+ Hits        52352    52393      +41     
+ Misses      20622    20581      -41     
  Partials     2050     2050              

Flag	Coverage Δ
mysql	77.91% <0.00%> (+0.02%)	⬆️
postgres	78.02% <0.00%> (ø)
presto	53.64% <0.00%> (?)
python	83.03% <0.00%> (+0.11%)	⬆️
sqlite	77.46% <0.00%> (ø)
unit	56.76% <0.00%> (ø)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[mistercrunch]

Reading the CHANGELOG https://flask-session.readthedocs.io/en/latest/changes.html, I greped for things that call to be deprecated and found a reference to SESSION_USE_SIGNER. Removing our reference to it and adding a note to UPDATING.md

[mistercrunch]

@dpgaspar let me know if you think that's ok

[dpgaspar]

We have this deprecation also:
Deprecate flask_session.filesystem.FileSystemSessionInterface in favor of the broader flask_session.cachelib.CacheLibSessionInterface (2bc7df).

seems it will be replaced by cachelib so this impacts SESSION_TYPE

[mistercrunch]

closing in favor of #27751 that follows a new branch-naming scheme