Copy v19.0.1 release notes on main (#15490)

Signed-off-by: Shlomi Noach <[email protected]>

changelog/19.0/19.0.1/changelog.md

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+# Changelog of Vitess v19.0.1
+
+### Bug fixes 
+#### Backup and Restore
+ * [release-19.0] Ensure that WithParams keeps the transport (#15421) [#15422](https://github.com/vitessio/vitess/pull/15422) 
+#### Query Serving
+ * [release-19.0] engine:  fix race in concatenate (#15454) [#15461](https://github.com/vitessio/vitess/pull/15461)
+ * [release-19.0] Fix view tracking on sharded keyspace (#15436) [#15477](https://github.com/vitessio/vitess/pull/15477)
+### CI/Build 
+#### Build/CI
+ * [release-19.0] Ensure to use latest golangci-lint (#15413) [#15414](https://github.com/vitessio/vitess/pull/15414)
+ * [release-19.0] bump `github.com/golang/protobuf` to `v1.5.4` (#15426) [#15428](https://github.com/vitessio/vitess/pull/15428)
+ * [release-19.0] Update all actions setup to latest versions (#15443) [#15446](https://github.com/vitessio/vitess/pull/15446) 
+#### Online DDL
+ * [release-19.0] `onlineddl_scheduler` test: fix flakiness in artifact cleanup test (#15396) [#15399](https://github.com/vitessio/vitess/pull/15399)
+### Documentation 
+#### Documentation
+ * [release-19.0] Fix docs for unmanaged tablets (#15437) [#15474](https://github.com/vitessio/vitess/pull/15474)
+### Release 
+#### General
+ * [release-19.0] Bump to `v19.0.1-SNAPSHOT` after the `v19.0.0` release [#15418](https://github.com/vitessio/vitess/pull/15418)
+ * [release-19.0] Code Freeze for `v19.0.1` [#15481](https://github.com/vitessio/vitess/pull/15481)
+### Testing 
+#### Build/CI
+ * [release-19.0] CI: Address data races on memorytopo Conn.closed (#15365) [#15371](https://github.com/vitessio/vitess/pull/15371)
+

changelog/19.0/19.0.1/release_notes.md

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+# Release of Vitess v19.0.1
+The entire changelog for this release can be found [here](https://github.com/vitessio/vitess/blob/main/changelog/19.0/19.0.1/changelog.md).
+
+The release includes 11 merged Pull Requests.
+
+Thanks to all our contributors: @app/vitess-bot, @systay
+

changelog/19.0/README.md

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 ## v19.0
+* **[19.0.1](19.0.1)**
+	* [Changelog](19.0.1/changelog.md)
+	* [Release Notes](19.0.1/release_notes.md)
+
 * **[19.0.0](19.0.0)**
 	* [Changelog](19.0.0/changelog.md)
 	* [Release Notes](19.0.0/release_notes.md)