Release Notes for 2.8.0 (#1676) (#1680)

Signed-off-by: Andrew Carbonetto <andrewc@bitquilltech.com>
(cherry picked from commit 567cabc)

Co-authored-by: Andrew Carbonetto <andrewc@bitquilltech.com>

release-notes/opensearch-sql.release-notes-2.8.0.0.md

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+Compatible with OpenSearch and OpenSearch Dashboards Version 2.8.0
+
+### Features
+
+* Support for pagination in v2 engine of SELECT * FROM <table> queries ([#1666](https://github.com/opensearch-project/sql/pull/1666))
+* Support Alternate Datetime Formats ([#1664](https://github.com/opensearch-project/sql/pull/1664))
+* Create new anonymizer for new engine ([#1665](https://github.com/opensearch-project/sql/pull/1665))
+* Add Support for Nested Function Use In WHERE Clause Predicate Expresion ([#1657](https://github.com/opensearch-project/sql/pull/1657))
+* Cross cluster search in PPL ([#1512](https://github.com/opensearch-project/sql/pull/1512))
+* Added COSH to V2 engine ([#1428](https://github.com/opensearch-project/sql/pull/1428))
+* REST API for GET,PUT and DELETE ([#1482](https://github.com/opensearch-project/sql/pull/1482))
+
+### Enhancements
+
+* Minor clean up of datetime and other classes ([#1310](https://github.com/opensearch-project/sql/pull/1310))
+* Add integration JDBC tests for cursor/fetch_size feature ([#1315](https://github.com/opensearch-project/sql/pull/1315))
+* Refactoring datasource changes to a new module. ([#1504](https://github.com/opensearch-project/sql/pull/1504))
+
+### Bug Fixes
+
+* Fixing bug where Nested functions used in WHERE, GROUP BY, HAVING, and ORDER BY clauses don't fallback to legacy engine. ([#1549](https://github.com/opensearch-project/sql/pull/1549))
+
+### Documentation
+
+* Add Nested Documentation for 2.7 Related Features ([#1620](https://github.com/opensearch-project/sql/pull/1620))
+* Update usage example doc for PPL cross-cluster search ([#1610](https://github.com/opensearch-project/sql/pull/1610))
+* Documentation and other papercuts for datasource api launch ([#1530](https://github.com/opensearch-project/sql/pull/1530))
+
+### Maintenance
+
+* Fix IT - address breaking changes from upstream. ([#1659](https://github.com/opensearch-project/sql/pull/1659))
+* Increment version to 2.8.0-SNAPSHOT ([#1552](https://github.com/opensearch-project/sql/pull/1552))
+* Backport maintainer list update to `2.x`. ([#1650](https://github.com/opensearch-project/sql/pull/1650))
+* Backport jackson and gradle update from #1580 to 2.x ([#1596](https://github.com/opensearch-project/sql/pull/1596))
+* adding reflections as a dependency ([#1559](https://github.com/opensearch-project/sql/pull/1596))
+* Bump org.json dependency version ([#1586](https://github.com/opensearch-project/sql/pull/1586))
+* Integ Test Fix ([#1541](https://github.com/opensearch-project/sql/pull/1541))