feat: Allow users to set Tab Title from superset_config.py

[hughhhh]

SUMMARY

Allow users to set Tab Title from superset_config.py

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 #21116 (053f4bc) into master (db7e2b2) will decrease coverage by 0.72%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #21116      +/-   ##
==========================================
- Coverage   66.27%   65.55%   -0.73%     
==========================================
  Files        1770     1770              
  Lines       67539    67540       +1     
  Branches     7185     7185              
==========================================
- Hits        44764    44277     -487     
- Misses      20936    21424     +488     
  Partials     1839     1839              

Flag	Coverage Δ
hive	53.17% <100.00%> (+<0.01%)	⬆️
mysql	?
postgres	?
presto	53.07% <100.00%> (+<0.01%)	⬆️
python	80.00% <100.00%> (-1.50%)	⬇️
sqlite	79.62% <100.00%> (+<0.01%)	⬆️
unit	50.74% <100.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
superset/config.py	91.50% <100.00%> (+0.02%)	⬆️
superset/datasets/commands/update.py	25.00% <0.00%> (-69.05%)	⬇️
superset/datasets/commands/create.py	29.41% <0.00%> (-68.63%)	⬇️
superset/datasets/commands/delete.py	38.63% <0.00%> (-54.55%)	⬇️
superset/datasets/commands/bulk_delete.py	33.33% <0.00%> (-53.34%)	⬇️
superset/datasets/columns/commands/delete.py	44.11% <0.00%> (-52.95%)	⬇️
superset/datasets/metrics/commands/delete.py	44.11% <0.00%> (-52.95%)	⬇️
superset/datasets/dao.py	44.21% <0.00%> (-50.35%)	⬇️
superset/sql_validators/postgres.py	50.00% <0.00%> (-50.00%)	⬇️
superset/datasets/commands/refresh.py	43.75% <0.00%> (-43.75%)	⬇️
... and 27 more

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[lyndsiWilliams]

lgtm!