add opensearch-dashboards-docker-dev to .gitignore (#3781)

(cherry picked from commit 6b42669)

Signed-off-by: Aigerim Suleimenova <aigerim.suleimenova27@gmail.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.gitignore

@@ -8,6 +8,7 @@
 .node_binaries
 .native_modules
 node_modules
+opensearch-dashboards-docker-dev/
 !/src/dev/npm/integration_tests/__fixtures__/fixture1/node_modules
 !/src/dev/notice/__fixtures__/node_modules
 trash