Added 2.10 release notes

Signed-off-by: Ashish Agrawal <ashisagr@amazon.com>

release-notes/opensearch-alerting.release-notes-2.10.0.0.md

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+## Version 2.10.0.0 2023-09-06
+Compatible with OpenSearch 2.10.0
+
+### Maintenance
+* Increment version to 2.10.0-SNAPSHOT. ([#1018](https://github.com/opensearch-project/alerting/pull/1018))
+* exclude <v32 version of google guava dependency from google java format and add google guava 32.0.1 to resolve CVE CVE-2023-2976 ([#1094](https://github.com/opensearch-project/alerting/pull/1094))
+
+### Feature
+* Add workflowIds field in getAlerts API  ([#1014](https://github.com/opensearch-project/alerting/pull/1014))
+* add alertId parameter in get chained alert API and paginate associated alerts if alertId param is mentioned ([#1071](https://github.com/opensearch-project/alerting/pull/1071))
+
+### Bug Fixes
+* fix get alerts alertState query filter ([#1064](https://github.com/opensearch-project/alerting/pull/1064))
+
+### Infrastructure
+* Upgrade the backport workflow ([#1028](https://github.com/opensearch-project/alerting/pull/1029))
+
+### Refactoring
+* Update actionGet to SuspendUntil for ClusterMetrics ([#1067](https://github.com/opensearch-project/alerting/pull/1067))
+* Resolve compile issues from core changes and update CIs ([#1100](https://github.com/opensearch-project/alerting/pull/1100))
+
+### Documentation
+* Added 2.10 release notes ([#1117](https://github.com/opensearch-project/alerting/pull/1117))