Explore Metrics: Explore Logs integration (#94656)

* initial logs integration

* rename back to Integrations

* remove comments

* connect related logs in metrics with logsIntegration service

* rename

* remove comments

* feat: related logs with loki expr

* fix: layout & var updates

* refactor: prefer scene state to context

* fix: limit DS select to relevant loki DSes

* refactor: use existing utils

* refactor: types

* fix: tests and types

* refactor: simplify

* refactor: prefer precise data updates

* refactor: prefer variable for key

* refactor: simplify panel search

* refactor: remove unnecessary short-circuit

* fix: ensure single network request for logs

* fix: add missing limit to fetched log lines

* refactor: add clarity

* refactor: organize imports

* feat: messaging for No Related Logs case

* fix: add missing space

* chore: add `exploreMetricsRelatedLogs` feature toggle

* feat: link to Explore Logs app

* fix: i18n

* fix: use sentence case consistent with design system

* style: avoid competing with metricscene buttons

* fix: capitalization for names

* fix: a11y

* refactor: clean up and document utils

* fix: formatting

* chore: run `make i18n-extract`

* test: improve coverage

* test: fix module resolution side-effects

* extract only the first rule

refactor: organize imports

* remove unnecessary test files

---------

Co-authored-by: Nick Richmond <nick.richmond@grafana.com>

pkg/services/featuremgmt/toggles_gen.json

@@ -1302,6 +1302,20 @@
         "expression": "true"
       }
     },
+    {
+      "metadata": {
+        "name": "exploreMetricsRelatedLogs",
+        "resourceVersion": "1730125602673",
+        "creationTimestamp": "2024-10-28T14:26:42Z"
+      },
+      "spec": {
+        "description": "Display Related Logs in Explore Metrics",
+        "stage": "experimental",
+        "codeowner": "@grafana/observability-metrics",
+        "frontend": true,
+        "hideFromDocs": true
+      }
+    },
     {
       "metadata": {
         "name": "expressionParser",