[CI/CD] Add Cypress e2e workflow for gantt chart #1

	name: Cypress E2E Gantt Chart Test

	on: [pull_request, push]

	env:
	PLUGIN_NAME: gantt-chart-dashboards
	OPENSEARCH_VERSION: 'main'
	OPENSEARCH_PLUGIN_VERSION: 3.0.0.0

	jobs:
	Get-CI-Image-Tag:
	uses: opensearch-project/opensearch-build/.github/workflows/get-ci-image-tag.yml@main
	with:
	product: opensearch-dashboards

	test:
	needs: Get-CI-Image-Tag
	runs-on: ubuntu-latest
	container:
	# using the same image which is used by opensearch-build team to build the OpenSearch Distribution
	# this image tag is subject to change as more dependencies and updates will arrive over time
	image: ${{ needs.Get-CI-Image-Tag.outputs.ci-image-version-linux }}
	# need to switch to root so that github actions can install runner binary on container without permission issues.
	options: --user root

	steps:
	- name: Checkout Plugin
	uses: actions/checkout@v2

	- name: Checkout OpenSearch Dashboards
	uses: actions/checkout@v2
	with:
	repository: opensearch-project/Opensearch-Dashboards
	ref: ${{ env.OPENSEARCH_VERSION }}
	path: dashboards-visualizations/OpenSearch-Dashboards

	- name: Move Gantt Chart to Plugins Dir
	run: \|
	mv gantt-chart ./dashboards-visualizations/OpenSearch-Dashboards/plugins

	- name: Plugin Bootstrap / stylelint / test
	run: \|
	chown -R 1000:1000 `pwd`
	cd dashboards-visualizations/OpenSearch-Dashboards/
	su `id -un 1000` -c "source $NVM_DIR/nvm.sh && nvm use && node -v && yarn -v &&
	cd ./plugins/gantt-chart &&
	whoami && yarn osd bootstrap

	- name: Where am I
	run: \|
	pwd
	npx cypress run

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