[Release 2.19] Add release notes for 2.19 (#3300)

Signed-off-by: Jialiang Liang <[email protected]>

Author: RyanL1997

release-notes/opensearch-sql.release-notes-2.19.0.0.md

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+Compatible with OpenSearch and OpenSearch Dashboards Version 2.19.0
+
+### Features
+
+* Call updateState when query is cancelled ([#3139](https://github.com/opensearch-project/sql/pull/3139))
+
+### Bug Fixes
+
+* Fix a regression issue of parsing datetime string with custom time format in Span ([#3079](https://github.com/opensearch-project/sql/pull/3079))
+* Fix: CSV and Raw output, escape quotes ([#3063](https://github.com/opensearch-project/sql/pull/3063))
+* Fix FilterOperator to cache next element and avoid repeated consumption on hasNext() calls ([#3123](https://github.com/opensearch-project/sql/pull/3123))
+* Function str_to_date should work with two-digits year ([#2841](https://github.com/opensearch-project/sql/pull/2841))
+
+### Enhancements
+
+* Add validation method for Flint extension queries and wire it into the dispatcher ([#3096](https://github.com/opensearch-project/sql/pull/3096))
+* Add grammar validation for PPL ([#3167](https://github.com/opensearch-project/sql/pull/3167))
+* Add validation for unsupported type/identifier/commands ([#3195](https://github.com/opensearch-project/sql/pull/3195))
+* Fix the flaky test testExtractDatePartWithTimeType() ([#3225](https://github.com/opensearch-project/sql/pull/3225))
+* Allow metadata fields in PPL query ([#2789](https://github.com/opensearch-project/sql/pull/2789))
+
+### Documentation
+
+* Added documentation for the plugins.query.field_type_tolerance setting ([#3118](https://github.com/opensearch-project/sql/pull/3118))
+
+### Maintenance
+
+* Fix spotless check failure for #3148 ([#3158](https://github.com/opensearch-project/sql/pull/3158))
+* Fix coverage issue for #3063 ([#3155](https://github.com/opensearch-project/sql/pull/3155))
+* Call LeaseManager for BatchQuery ([#3153](https://github.com/opensearch-project/sql/pull/3153))
+* Make GrammarElement public ([#3161](https://github.com/opensearch-project/sql/pull/3161))
+* Update grammar validation settings ([#3165](https://github.com/opensearch-project/sql/pull/3165))
+* [Backport 2.x] Add release notes for 1.3.15 ([#2537](https://github.com/opensearch-project/sql/pull/2537))
+* Fix DateTimeFunctionTest.testWeekOfYearWithTimeType and YearWeekTestt.testYearWeekWithTimeType Test Failures ([#3235](https://github.com/opensearch-project/sql/pull/3235))
+
+### Infrastructure
+
+* [AUTO] Increment version to 2.19.0-SNAPSHOT ([#3119](https://github.com/opensearch-project/sql/pull/3119))
+* Fix: CI Github Action ([#3177](https://github.com/opensearch-project/sql/pull/3177))
+* Artifacts to upload should include the java version in its name to avoid conflicts ([#3239](https://github.com/opensearch-project/sql/pull/3239))