VSD – Remove old metrics for tracking drill-down click events

What does this MR do and why?

• Removes the deprecated value_streams_dashboard_metric_link_clicked and value_streams_dashboard_${metric_identifier}_link_clicked events from both the Value Streams Dashboard and AI impact dashboard
• Migrates the trackEvent call to the shared MetricTableCell component

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

No visible change

How to set up and validate locally

• Please make sure that you have a GitLab Ultimate license.
• Start the internal events monitor rails runner scripts/internal_events/monitor.rb click_metric_in_dashboard_table (see docs for more info)
• Navigate to any Value streams dashboard (ex. http://gdk.test:3000/groups/flightjs/-/analytics/dashboards/value_streams_dashboard)
• Verify that clicking any metric name tracks the event
• Navigate to any AI impact dashboard (ex. http://gdk.test:3000/groups/flightjs/-/analytics/dashboards/ai_impact)
• Verify that clicking any metric name tracks the event

Related to #469128 (closed)

ee/spec/frontend/analytics/dashboards/components/comparison_table_spec.js

 import { mountExtended } from 'helpers/vue_test_utils_helper';
 import { createMockDirective, getBinding } from 'helpers/vue_mock_directive';
-import { useMockInternalEventsTracking } from 'helpers/tracking_internal_events_helper';
 import { setLanguage } from 'jest/__helpers__/locale_helper';
 import {
   TABLE_METRICS,
@@ -8,10 +7,7 @@ import {
   CHART_GRADIENT_INVERTED,
 } from 'ee/analytics/dashboards/constants';
 import ComparisonTable from 'ee/analytics/dashboards/components/comparison_table.vue';
-import {
-  EVENT_LABEL_CLICK_METRIC_IN_DASHBOARD_TABLE,
-  VSD_COMPARISON_TABLE_TRACKING_PROPERTY,
-} from 'ee/analytics/analytics_dashboards/constants';
+import { VSD_COMPARISON_TABLE_TRACKING_PROPERTY } from 'ee/analytics/analytics_dashboards/constants';
 import { mockComparativeTableData } from '../mock_data';
 
 describe('Comparison table', () => {
@@ -55,33 +51,7 @@ describe('Comparison table', () => {
         expect(findMetricTableCell(identifier).props()).toMatchObject({
           identifier,
           filterLabels,
-        });
-      });
-
-      describe('drill-down clicked event', () => {
-        const { bindInternalEventDocument } = useMockInternalEventsTracking();
-
-        beforeEach(() => {
-          findMetricTableCell(identifier).vm.$emit('drill-down-clicked');
-        });
-
-        it('should send three tracking events', () => {
-          const { trackEventSpy } = bindInternalEventDocument(wrapper.element);
-
-          expect(trackEventSpy).toHaveBeenCalledTimes(3);
-        });
-
-        it(`should track the '${EVENT_LABEL_CLICK_METRIC_IN_DASHBOARD_TABLE}' event`, () => {
-          const { trackEventSpy } = bindInternalEventDocument(wrapper.element);
-
-          expect(trackEventSpy).toHaveBeenCalledWith(
-            EVENT_LABEL_CLICK_METRIC_IN_DASHBOARD_TABLE,
-            {
-              label: identifier,
-              property: VSD_COMPARISON_TABLE_TRACKING_PROPERTY,
-            },
-            undefined,
-          );
+          trackingProperty: VSD_COMPARISON_TABLE_TRACKING_PROPERTY,
         });
       });
     });