fix(Dashboard): Retain colors when color scheme not set

[geido]

SUMMARY

This PR does the following:

• It fixes an issue for which colors would sometimes not keep their consistency when leaving and revisiting the Dashboard.
• It fixes an issue for which charts original color schemes were not tracked making falling back to their origin color scheme impossible when removing the color scheme from the Dashboard.
• It attempts to fix and re-enable skipped E2E tests that are critical for the coverage of the color consistency implementation.
• Fixes Cannot set color scheme for dashboard-associated chart even when dashboard color scheme is cleared #23874 with limitations:
  • The color scheme cannot be changed if the chart shares labels with multiple charts in the Dashboard.
  • When setting custom label colors via the advanced settings of the Dashboard, the custom label colors will always be enforced also when a color scheme is not set for the Dashboard.
  • The chart should consistently display colors that match those used in the Dashboard.

BEFORE

Color.Consistency.Test.mp4

AFTER

Color.Consistency.Test.1.mp4

TESTING INSTRUCTIONS

1. Open a Dashboard with a color scheme and shared label colors
2. Edit the Dashboard properties and remove the color scheme
3. After applying the changes, verify that shared label colors are still respected
4. For charts that do not share labels, verify their original color scheme is respected
5. Save and exit the Dashboard by going to the Dashboard lists
6. Come back again to the same Dashboard you just saved
7. Make sure colors haven't changed from the previous state

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

[hanslemm]

Upvote for this. This problem is annoying.

[rusackas]

OMG thank you!

[rusackas]

Thanks for fixing, LGTM!

[geido]

I will try to tackle an issue for which after deleting a color scheme from a Dashboard and then editing the Chart from the Dashboard, Explore won't allow to customize the color.

[fisjac]

LGTM

[kgabryje]

/testenv up

[github-actions]

@kgabryje Ephemeral environment spinning up at http://35.93.185.64:8080. Credentials are admin/admin. Please allow several minutes for bootstrapping and startup.