chore: Fix Pylint errors

[AAfghahi]

SUMMARY

This will be going through and fixing many of the pylint errors that are in chart-power-query

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-commenter]

Codecov Report

Merging #225 (ac8c17f) into chart-power-query (e076f13) will decrease coverage by 12.21%.
The diff coverage is 64.39%.

❗ Current head ac8c17f differs from pull request most recent head be70356. Consider uploading reports for the commit be70356 to get more accurate results

@@                  Coverage Diff                   @@
##           chart-power-query     #225       +/-   ##
======================================================
- Coverage              66.67%   54.46%   -12.22%     
======================================================
  Files                   1738     1751       +13     
  Lines                  65081    66148     +1067     
  Branches                6888     6912       +24     
======================================================
- Hits                   43393    36025     -7368     
- Misses                 19939    28374     +8435     
  Partials                1749     1749               

Flag	Coverage Δ
hive	?
mysql	?
postgres	?
presto	52.90% <65.30%> (-0.68%)	⬇️
python	57.20% <69.38%> (-25.59%)	⬇️
sqlite	?
unit	49.98% <65.30%> (-0.18%)	⬇️

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

Impacted Files	Coverage Δ
...art-controls/src/operators/contributionOperator.ts	100.00% <ø> (ø)
...ui-chart-controls/src/operators/flattenOperator.ts	100.00% <ø> (ø)
...ui-chart-controls/src/operators/prophetOperator.ts	100.00% <ø> (ø)
...i-chart-controls/src/operators/resampleOperator.ts	100.00% <ø> (ø)
...ui-core/src/chart/components/FallbackComponent.tsx	100.00% <ø> (ø)
...ackages/superset-ui-core/src/query/api/v1/types.ts	100.00% <ø> (ø)
.../superset-ui-core/src/query/types/QueryFormData.ts	100.00% <ø> (ø)
...set-ui-core/src/ui-overrides/UiOverrideRegistry.ts	100.00% <ø> (ø)
...s/legacy-plugin-chart-calendar/src/controlPanel.ts	50.00% <0.00%> (-50.00%)	⬇️
...gins/legacy-plugin-chart-chord/src/controlPanel.ts	25.00% <0.00%> (-75.00%)	⬇️
... and 569 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 18b6fa1...be70356. Read the comment docs.