fix: advanced filters could not be cleared from the filter bar

[nishantmonu51]

A filter the chips cannot represent (a top level OR, an operator without a chip mode, or the same dimension filtered twice) left the filter bar with only the read-only "Advanced (BETA)" pill and no way to remove it. Regression from #9746, where the "Clear filters" button moved inside the chip branch.

• ExpressionFilters.svelte: "Clear filters" renders for an advanced filter too. It is gated on isComplexFilter rather than on the pill, since a param the chips cannot show may parse to no pill at all. The Add filter button stays hidden while the pill is shown.
• AdvancedFilter.svelte: migrated to runes and given an optional onRemove, rendered as a remove button next to the pill. The filter bar and the canvas inspector pass expressionFilterManager.clear(); read-only surfaces leave it unset.
• ExpressionFilterManager.clear() resets isComplexFilter. The navigation after a clear does not parse the params again, so without this the bar stayed empty with no Add filter button.
• VerticalExpressionFilters.svelte (canvas inspector) gates its Clear button on the flag as well, since a pure OR has no top-level chip managers.
• New filter_advanced_remove message in both locales.
• Tests: a manager unit test, a shared "Advanced filters" group run by the explore, canvas and standalone component specs (their test wrappers now supply the Tooltip.Provider the pill needs), and a Playwright test that clears the filter from a shared URL and reloads.

The sessionStorage restore for an empty explore URL is unchanged: the cleared state is what gets persisted now, so a reload stays clean.

Steps to reproduce

1. Open an explore with a filter the chips cannot show, e.g. /explore/AdBids_metrics_explore?f=publisher IN ('Facebook') OR domain IN ('google.com').
2. Before: only the "Advanced (BETA)" pill renders, with no remove control and no "Clear filters" button. Removing the query string and reloading brings the filter back from sessionStorage.
3. After: the pill has a remove button and "Clear filters" sits next to it. Either one empties the bar, the Add filter button returns, and a reload keeps the filter cleared.

Closes ENG-1136

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!

[k-anshul]

Did an experience pass and LGTM from the experience POV.