refactor: Removes embedded/index.tsx warnings

[michael-s-molina]

SUMMARY

• Replaces console invocations with logging from @superset-ui/core
• Moves the showFailureMessage function to avoid the was used before it was defined warning

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

[lilykuang]

LGTM

[codecov]

Codecov Report

Merging #20193 (19d1dd5) into master (4674de1) will decrease coverage by 0.05%.
The diff coverage is 0.00%.

❗ Current head 19d1dd5 differs from pull request most recent head 7c2f2e4. Consider uploading reports for the commit 7c2f2e4 to get more accurate results

@@            Coverage Diff             @@
##           master   #20193      +/-   ##
==========================================
- Coverage   66.32%   66.26%   -0.06%     
==========================================
  Files        1722     1722              
  Lines       64639    64639              
  Branches     6822     6822              
==========================================
- Hits        42874    42836      -38     
- Misses      20031    20069      +38     
  Partials     1734     1734              

Flag	Coverage Δ
javascript	51.29% <0.00%> (ø)
presto	?

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Impacted Files	Coverage Δ
superset-frontend/src/embedded/index.tsx	0.00% <0.00%> (ø)
superset/db_engine_specs/presto.py	83.36% <0.00%> (-5.34%)	⬇️
superset/connectors/sqla/models.py	88.41% <0.00%> (-1.01%)	⬇️
superset/models/core.py	88.91% <0.00%> (-0.25%)	⬇️

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