fix: correct exception level in log and add error message

[eschutho]

SUMMARY

Followup to #21971, this PR makes a slight correction to print the string value of the logger level in the logs, and also passes in the error message. I'm also including the stack trace for warning level logs.

TESTING INSTRUCTIONS

If you were to run this manually, you would see that error messages correctly say A downstream exception occurred while generating a report instead of A downstream LoggerLevel.EXCEPTION occurred while generating a report and also have an added message at the end of the log and a stack trace for both exceptions and warnings.

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 #22381 (3b4c7c5) into master (de4f509) will decrease coverage by 1.48%.
The diff coverage is 66.66%.

❗ Current head 3b4c7c5 differs from pull request most recent head a499cea. Consider uploading reports for the commit a499cea to get more accurate results

@@            Coverage Diff             @@
##           master   #22381      +/-   ##
==========================================
- Coverage   66.86%   65.37%   -1.49%     
==========================================
  Files        1847     1847              
  Lines       70562    70562              
  Branches     7741     7741              
==========================================
- Hits        47179    46130    -1049     
- Misses      21382    22431    +1049     
  Partials     2001     2001              

Flag	Coverage Δ
hive	?
mysql	77.98% <100.00%> (+0.02%)	⬆️
postgres	78.04% <100.00%> (+0.02%)	⬆️
presto	?
python	78.10% <100.00%> (-3.13%)	⬇️
sqlite	?
unit	?

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

Impacted Files	Coverage Δ
...ugins/legacy-plugin-chart-pivot-table/src/index.js	66.66% <ø> (ø)
...d/plugins/legacy-plugin-chart-treemap/src/index.js	66.66% <ø> (ø)
...plugins/legacy-preset-chart-nvd3/src/Area/index.js	66.66% <ø> (ø)
.../plugins/legacy-preset-chart-nvd3/src/Bar/index.js	66.66% <ø> (ø)
...plugins/legacy-preset-chart-nvd3/src/Line/index.js	66.66% <ø> (ø)
.../plugin-chart-echarts/src/Timeseries/Area/index.ts	33.33% <ø> (ø)
...-chart-echarts/src/Timeseries/Regular/Bar/index.ts	33.33% <0.00%> (ø)
...chart-echarts/src/Timeseries/Regular/Line/index.ts	33.33% <ø> (ø)
.../plugins/plugin-chart-echarts/src/Treemap/index.ts	50.00% <ø> (ø)
...ugins/plugin-chart-pivot-table/src/plugin/index.ts	66.66% <ø> (ø)
... and 87 more

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