fix(build): enable hot reloading of linked packages

[villebro]

SUMMARY

The recent upgrade of Webpack to version 5 (#16701) broke hot reloading of linked packages. This fixes hot reloading by enabling the config.watchOptions.followSymlinks flag (https://webpack.js.org/configuration/watch/#watchoptionsfollowsymlinks) . Enabling config.resolve.symlinks doesn't work, as it breaks a bunch of dependencies. We also ignore a few type errors that are raised when linking superset-ui/core. It is unclear why this error is raised when npm linking, but appears to be happening due to fairly complex polymorphism in the registry classes.

TESTING INSTRUCTIONS

1. npm ci
2. Link core and chart-controls and a chart plugin, e.g. npm link ../../superset-ui/packages/superset-ui-core ../../superset-ui/packages/superset-ui-chart-controls ../../superset-ui/plugins/plugin-chart-echarts
3. npm run dev-server

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 #16867 (643b0d4) into master (27a40d2) will not change coverage.
The diff coverage is n/a.

❗ Current head 643b0d4 differs from pull request most recent head c40e73c. Consider uploading reports for the commit c40e73c to get more accurate results

@@           Coverage Diff           @@
##           master   #16867   +/-   ##
=======================================
  Coverage   77.05%   77.05%           
=======================================
  Files        1021     1021           
  Lines       54693    54693           
  Branches     7457     7457           
=======================================
  Hits        42141    42141           
  Misses      12307    12307           
  Partials      245      245           

Flag	Coverage Δ
javascript	71.19% <ø> (ø)

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Impacted Files	Coverage Δ
superset-frontend/src/setup/setupColors.ts	100.00% <ø> (ø)

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[stephenLYZ]

LGTM! Thanks for the fix!

[zhaoyongjie]

LGTM, Thanks for the fix!