chore: Moves messageToasts to the components folder

[michael-s-molina]

SUMMARY

• Moves messageToasts to the components folder
• Moves related spec files alongside
• Simplifies folder structure
• Removes unused constants.ts

This work is part of SIP-61

@rusackas @pkdotson

TEST PLAN

1 - Execute all tests
2 - All tests should pass

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 #14431 (082eba4) into master (cc1c6c1) will decrease coverage by 0.00%.
The diff coverage is 90.47%.

❗ Current head 082eba4 differs from pull request most recent head e4c6faa. Consider uploading reports for the commit e4c6faa to get more accurate results

@@            Coverage Diff             @@
##           master   #14431      +/-   ##
==========================================
- Coverage   76.98%   76.98%   -0.01%     
==========================================
  Files        1007     1006       -1     
  Lines       54174    54169       -5     
  Branches     7463     7462       -1     
==========================================
- Hits        41708    41703       -5     
  Misses      12226    12226              
  Partials      240      240              

Flag	Coverage Δ
javascript	71.30% <90.47%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
superset-frontend/src/SqlLab/actions/sqlLab.js	59.01% <ø> (ø)
superset-frontend/src/SqlLab/components/App.jsx	57.14% <ø> (ø)
...et-frontend/src/SqlLab/reducers/getInitialState.js	50.00% <ø> (ø)
superset-frontend/src/chart/chartAction.js	50.96% <ø> (ø)
...-frontend/src/components/CopyToClipboard/index.jsx	94.28% <ø> (ø)
...nd/src/components/MessageToasts/ToastContainer.jsx	100.00% <ø> (ø)
...nd/src/components/MessageToasts/ToastPresenter.tsx	100.00% <ø> (ø)
...ents/MessageToasts/getToastsFromPyFlashMessages.js	100.00% <ø> (ø)
...-frontend/src/components/MessageToasts/reducers.js	92.30% <ø> (ø)
...set-frontend/src/components/MessageToasts/types.ts	100.00% <ø> (ø)
... and 57 more

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[rusackas]

/testenv up

[github-actions]

@rusackas Ephemeral environment spinning up at http://54.190.162.86:8080. Credentials are admin/admin. Please allow several minutes for bootstrapping and startup.

[geido]

LGTM!

[rusackas]

Saw this sitting around. Obviously it needs a big ol' rebase, and there may be a few new instances of messageToasts that also need addressing, but the code that's here now looks perfectly fine to me.

[etr2460]

love it, thanks for cleaning up the code!

[github-actions]

Ephemeral environment shutdown and build artifacts deleted.