[8.19] ES|QL CCS GA release notes highlight (#130032) (#130034)

* ES|QL CCS GA release notes highlight (#130032)

* ESQL CCS GA

* Update docs/changelog/130034.yaml

* Update 130034.yaml

* Delete docs/changelog/130032.yaml

* Update docs/changelog/130034.yaml

* Update 130034.yaml

docs/changelog/130034.yaml

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+pr: 130034
+summary: ES|QL cross-cluster querying is now generally available
+area: ES|QL
+type: feature
+issues: []
+highlight:
+  title: ES|QL cross-cluster querying is now generally available
+  body: |-
+    The ES|QL Cross-Cluster querying feature has been in technical preview since 8.13.
+    As of releases 8.19.0 and 9.1.0 this is now generally available.
+    This feature allows you to run ES|QL queries across multiple clusters.
+  notable: true