feat: Add gte and lte filters for sqla

[fredthomsen]

Description

Add <= and >= filters for SQLA. These seem common enough that including them here makes sense.

ADDITIONAL INFORMATION

• Has associated issue:
• Is CRUD MVC related.
• Is Auth, RBAC security related.
• Changes the security db schema.
• Introduces new feature
• Removes existing feature

[codecov]

Codecov Report

Merging #1787 (6c1d020) into master (e2b744c) will decrease coverage by 30.54%.
The diff coverage is 44.44%.

@@             Coverage Diff             @@
##           master    #1787       +/-   ##
===========================================
- Coverage   77.05%   46.50%   -30.55%     
===========================================
  Files          56       56               
  Lines        8175     8046      -129     
===========================================
- Hits         6299     3742     -2557     
- Misses       1876     4304     +2428     

Flag	Coverage Δ
python	46.50% <44.44%> (-30.55%)	⬇️

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

Impacted Files	Coverage Δ
flask_appbuilder/models/sqla/filters.py	44.32% <44.44%> (-36.52%)	⬇️
flask_appbuilder/security/sqla/models.py	0.00% <0.00%> (-97.94%)	⬇️
flask_appbuilder/models/generic/interface.py	0.00% <0.00%> (-92.31%)	⬇️
flask_appbuilder/models/generic/filters.py	0.00% <0.00%> (-78.38%)	⬇️
flask_appbuilder/api/convert.py	20.14% <0.00%> (-72.00%)	⬇️
flask_appbuilder/security/sqla/manager.py	0.00% <0.00%> (-71.39%)	⬇️
flask_appbuilder/models/sqla/interface.py	19.20% <0.00%> (-59.64%)	⬇️
flask_appbuilder/hooks.py	43.33% <0.00%> (-56.67%)	⬇️
flask_appbuilder/api/__init__.py	40.52% <0.00%> (-55.88%)	⬇️
flask_appbuilder/api/schemas.py	47.61% <0.00%> (-52.39%)	⬇️
... and 33 more

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[fedepad]

The tests seem to fail because you need to update the field_* here: https://github.com/dpgaspar/Flask-AppBuilder/blob/master/flask_appbuilder/tests/test_api.py#L1783

by adding the new filters for the field_* types for which you defined them in the conversion table.
As far as I can see from your code you will need to add for field_date, field_integer, field_float.
If you need to update other tests you will see.
Check if you need to implement for Mongo too if the same test is run for both...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Feel free to reopen it if it's still relevant to you. Thank you