test(canvas): lock filter scope parity between filter bar and table click

[Tyagiquamar]

Related to #9845.

Problem

#9845 reports that the same dimension filter reaches all metrics views when set from the filter bar (\.=...\ per view) but only one view when set by clicking a table, while the bar renders an identical single chip in both cases.

Root cause

On current \main\ both paths already converge on the shared \DimensionFilterManager\ plus \JoinerFilterManager.buildExpression\ fan-out (unified by #9746), so the divergent writes from the issue no longer reproduce. Nothing pins that behavior, though: the pivot click path (\createPivotClickToFilter\ -> \dimensionFilterAction) had no coverage asserting what URL params a click produces.

Fix

No behavior change. Adds a two-metrics-view harness (\mv1\ + \mv2\ sharing \country) to \pivot-click-to-filter.spec.ts\ with two regression tests:

• a table click writes \country IN (...)\ to both \.mv1\ and \.mv2;
• the filter bar path (\�ddNewFilter\ + selection) writes byte-identical params, with a single chip.

Regression test

New \canvas filter scope parity\ describe block in \pivot-click-to-filter.spec.ts. Full file: 50/50 pass. \ExpressionFilterManager.spec.ts: 69/69 pass (unchanged).

Validation

• 
  px vitest run src/features/canvas/components/pivot/pivot-click-to-filter.spec.ts --pool threads --no-isolate: 50 passed.
• 
  px vitest run src/features/dashboards/filters/ExpressionFilterManager.spec.ts --pool threads --no-isolate: 69 passed.
• 
  px prettier --check\ on the spec file: clean.
  px eslint\ on it: 0 errors (1 pre-existing warning on untouched code).
• Note: vitest needed --pool threads --no-isolate\ on Windows (forks worker RPC times out) and a local \paraglide-js compile\ for the gitignored i18n \gen/\ dir before the suites resolve imports. Full monorepo suite left to CI.

[AdityaHegde]

nit: move these alongside PIVOT_METRICS_INIT in pivot-test-data.

[AdityaHegde]

Lets not add a tests specifically for the issue.

1. You can just add PIVOT_MIRROR_METRICS_NAME to the shared manager in the top level beforeAll.
2. Add assertions in table variant tests, flat table: single-cell-per-row, nested table: multi-select and nested table: cross-parent selection isolation.
3. Add a test in each where filter bar changes update pivot (maybe out of scope if this doesn't work)

[AdityaHegde]

This is redundant to checking individual metrics views. Adding assertion in existing tests should be enough.