fix: using sqla session to persist permission view

[zephyring]

SUMMARY

1. In security manager, set_perm, instead of using connection to update perm directly, we should use sqla session.
2. This will enable proper callback function to be triggered for PermissionView object

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #20590 (760097d) into master (8a57a71) will decrease coverage by 11.81%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master   #20590       +/-   ##
===========================================
- Coverage   66.80%   54.98%   -11.82%     
===========================================
  Files        1754     1754               
  Lines       65562    65560        -2     
  Branches     6935     6935               
===========================================
- Hits        43796    36047     -7749     
- Misses      20011    27758     +7747     
  Partials     1755     1755               

Flag	Coverage Δ
hive	53.77% <100.00%> (-0.01%)	⬇️
mysql	?
postgres	?
presto	53.63% <100.00%> (-0.01%)	⬇️
python	58.36% <100.00%> (-24.50%)	⬇️
sqlite	?
unit	50.64% <33.33%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
superset/connectors/sqla/utils.py	80.68% <100.00%> (-7.96%)	⬇️
superset/security/manager.py	62.18% <100.00%> (-33.16%)	⬇️
superset/utils/dashboard_import_export.py	0.00% <0.00%> (-100.00%)	⬇️
superset/key_value/commands/upsert.py	0.00% <0.00%> (-89.59%)	⬇️
superset/key_value/commands/update.py	0.00% <0.00%> (-89.37%)	⬇️
superset/key_value/commands/delete.py	0.00% <0.00%> (-85.30%)	⬇️
superset/key_value/commands/delete_expired.py	0.00% <0.00%> (-80.77%)	⬇️
superset/dashboards/commands/importers/v0.py	15.62% <0.00%> (-76.25%)	⬇️
superset/datasets/commands/update.py	25.88% <0.00%> (-68.24%)	⬇️
superset/datasets/commands/create.py	30.18% <0.00%> (-67.93%)	⬇️
... and 277 more

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