fix: tag removal not working in dashboard properties modal

[krikera]

Fix: Tag Removal Not Working in Dashboard Properties Modal

Problem

• Tag removal works correctly in the Explore Properties Modal but fails in the Dashboard Properties Modal.
• Users can add tags, but cannot remove them using the clear functionality.

Solution

• Implemented the missing handleClearTags function in the Dashboard PropertiesModal.
• Connected the onClear prop to the AsyncSelect component.
• Mirrored the working implementation pattern used in the Explore PropertiesModal for consistency and reliability.

Testing

• All existing unit and integration tests pass.
• Manual testing confirms that tag removal now functions as expected in dashboard edit mode.

Additional Information

• [x] Fixes #33758
• [ ] Has associated issue
• [ ] Required feature flags
• [ ] Changes UI
• [ ] Includes DB Migration (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

[rusackas]

Thanks for the PR! Running CI 🤞

[github-actions[bot]]

@Vitor-Avila Processing your ephemeral environment request here. Action: up. More information on how to use or configure ephemeral environments

[github-actions[bot]]

@Vitor-Avila Ephemeral environment spinning up at http://35.89.136.42:8080. Credentials are 'admin'/'admin'. Please allow several minutes for bootstrapping and startup.

[github-actions[bot]]

@Vitor-Avila Processing your ephemeral environment request here. Action: up. More information on how to use or configure ephemeral environments

[Vitor-Avila]

Trying to spin up an ephemeral with TAGGING_SYSTEM enabled

[github-actions[bot]]

@Vitor-Avila Ephemeral environment spinning up at http://44.247.50.122:8080. Credentials are 'admin'/'admin'. Please allow several minutes for bootstrapping and startup.

[Vitor-Avila]

@krikera I'm still able to reproduce the issue in the ephemeral (it seems that neither removing a single tag or fully cleaning the list is working). Are you able to double check?

[xavier-GitHub76]

I try on http://44.247.50.122:8080/ and I reproduce the issue

[rusackas]

Superset adds some tags that we don't display. Is this overly-nuking things we shouldn't be clearing? (cc @Vitor-Avila)

[Vitor-Avila]

Superset adds some tags that we don't display. Is this overly-nuking things we shouldn't be clearing? (cc @Vitor-Avila)

@rusackas that could be possible too (don't remember if I checked that) but last time I reviewed this fix in the ephemeral the issue was still reproducible. @krikera I'm wondering if you're seeing a different thing locally?