chore(metastore-cache): add codec support

[villebro]

SUMMARY

This PR adds the option to use a custom codec for serializing/deserializing values in the SupersetMetastoreCache. In addition, the default Explore form data and Dashboard filter state cache config is changed to use the JSON key-value codec. This will not affect deployments that are using Redis or another cache. In addition, we're already emitting a warning when using it in prod, and since it will only cause a problem if a user happens to refresh their browser right after the state has last been updated, there is minimal risk that this will cause issues for users.

Tests are added to ensure that the cache works as expected with both the JSON and Pickle codecs.

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 #24586 (7d08c7e) into master (226c7f8) will decrease coverage by 0.02%.
The diff coverage is 90.90%.

❗ Current head 7d08c7e differs from pull request most recent head af1ce10. Consider uploading reports for the commit af1ce10 to get more accurate results

@@            Coverage Diff             @@
##           master   #24586      +/-   ##
==========================================
- Coverage   69.08%   69.06%   -0.02%     
==========================================
  Files        1906     1906              
  Lines       74168    74175       +7     
  Branches     8164     8164              
==========================================
- Hits        51239    51232       -7     
- Misses      20807    20821      +14     
  Partials     2122     2122              

Flag	Coverage Δ
hive	53.93% <9.09%> (-0.01%)	⬇️
mysql	?
postgres	79.47% <63.63%> (-0.02%)	⬇️
presto	53.82% <9.09%> (-0.01%)	⬇️
python	83.44% <90.90%> (-0.04%)	⬇️
sqlite	78.04% <63.63%> (-0.01%)	⬇️
unit	54.69% <90.90%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
superset/extensions/metastore_cache.py	96.61% <90.00%> (-1.51%)	⬇️
superset/config.py	92.06% <100.00%> (+0.02%)	⬆️

... and 7 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[eschutho]

@michael-s-molina I see that this PR is flagged for 3.0. You'll probably also want to bring in #24970

[michael-s-molina]

@michael-s-molina I see that this PR is flagged for 3.0. You'll probably also want to bring in #24970

Thanks @eschutho. Will do.