feat(ssh-tunnel): ssh manager config + feature flag

[hughhhh]

SUMMARY

Created a config object class to manage how ssh tunnels can be configured. The main use case for this is to allow mutation and validation on ssh tunnels being created for a given superset instance. For the SSHManager the

class SSHManager:
     def validate(self, ssh_tunnel_params: Dict[str, Any]):
         # validation on CREATE + UPDATE on SSHTunnel Model
         raise NotImplemented()

     def mutator(self, ssh_tunnel_params: Dict[str, Any]):
         # override any ssh tunnel configuration object
         raise NotImplemented()

     @property
     def local_bind_address(self):
         # set the local binding address for the local client
         # the port will be dynamically configured by the sshtunnel.SSHTunnelForwarder
        # `server` return value
        return "127.0.0.1"

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[bot]]

Codecov Report

Merging #22201 (c6a3dee) into create-sshtunnelconfig-tbl (e3ef835) will decrease coverage by 11.16%. The diff coverage is 69.23%.

:exclamation: Current head c6a3dee differs from pull request most recent head 146c476. Consider uploading reports for the commit 146c476 to get more accurate results

@@                       Coverage Diff                       @@
##           create-sshtunnelconfig-tbl   #22201       +/-   ##
===============================================================
- Coverage                       66.95%   55.79%   -11.17%     
===============================================================
  Files                            1852     1852               
  Lines                           70504    70511        +7     
  Branches                         7689     7689               
===============================================================
- Hits                            47206    39341     -7865     
- Misses                          21304    29176     +7872     
  Partials                         1994     1994               

Flag	Coverage Δ
hive	52.58% <69.23%> (+<0.01%)	:arrow_up:
mysql	?
postgres	?
presto	52.47% <69.23%> (+<0.01%)	:arrow_up:
python	57.97% <69.23%> (-23.38%)	:arrow_down:
sqlite	?
unit	51.11% <69.23%> (+<0.01%)	:arrow_up:

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

Impacted Files	Coverage Δ
superset/constants.py	100.00% <ø> (ø)
superset/config.py	90.82% <66.66%> (-1.03%)	:arrow_down:
superset/models/core.py	76.73% <66.66%> (-13.05%)	:arrow_down:
superset/databases/ssh_tunnel/models.py	75.86% <100.00%> (ø)
superset/utils/dashboard_import_export.py	0.00% <0.00%> (-100.00%)	:arrow_down:
superset/tags/core.py	4.54% <0.00%> (-95.46%)	:arrow_down:
superset/key_value/commands/update.py	0.00% <0.00%> (-90.91%)	:arrow_down:
superset/key_value/commands/delete.py	0.00% <0.00%> (-87.88%)	:arrow_down:
superset/key_value/commands/delete_expired.py	0.00% <0.00%> (-84.00%)	:arrow_down:
superset/dashboards/commands/importers/v0.py	15.62% <0.00%> (-76.25%)	:arrow_down:
... and 288 more

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