feat: add timezone selector to report modal

[eschutho]

SUMMARY

This PR adds the timezone selector to the reports modal

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• 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 #15922 (5c8f530) into selfSubscribeReports (a6687d3) will increase coverage by 0.23%.
The diff coverage is 100.00%.

❗ Current head 5c8f530 differs from pull request most recent head b714fd6. Consider uploading reports for the commit b714fd6 to get more accurate results

@@                   Coverage Diff                    @@
##           selfSubscribeReports   #15922      +/-   ##
========================================================
+ Coverage                 76.58%   76.82%   +0.23%     
========================================================
  Files                       989      989              
  Lines                     51977    52023      +46     
  Branches                   7102     7103       +1     
========================================================
+ Hits                      39809    39969     +160     
+ Misses                    11943    11829     -114     
  Partials                    225      225              

Flag	Coverage Δ
javascript	71.70% <100.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
...end/src/components/Form/LabeledErrorBoundInput.tsx	100.00% <100.00%> (ø)
...rset-frontend/src/components/ReportModal/index.tsx	94.73% <100.00%> (+0.61%)	⬆️
superset/connectors/sqla/views.py	64.01% <0.00%> (-0.31%)	⬇️
superset/errors.py	100.00% <0.00%> (ø)
superset/reports/notifications/email.py	100.00% <0.00%> (ø)
superset/sql_parse.py	99.38% <0.00%> (+<0.01%)	⬆️
superset/connectors/sqla/models.py	88.31% <0.00%> (+0.01%)	⬆️
superset/initialization/__init__.py	87.91% <0.00%> (+0.08%)	⬆️
superset/migrations/shared/security_converge.py	86.92% <0.00%> (+0.10%)	⬆️
superset/utils/log.py	93.10% <0.00%> (+0.14%)	⬆️
... and 23 more

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[eschutho]

This fixes a portion of #13954