[Backport 2.x] [Refactor] Remove bloat due to unnecessary setup in test and add retry for potential flaky behavior due to timeout #2926

	name: Test MLCommons BWC
	on:
	push:
	branches:
	- "*"
	pull_request:
	branches:
	- "*"

	jobs:
	Build-ad:
	strategy:
	matrix:
	java: [11,17]
	fail-fast: false

	name: Test MLCommons BWC
	runs-on: ubuntu-latest

	steps:
	- name: Setup Java ${{ matrix.java }}
	uses: actions/setup-java@v1
	with:
	java-version: ${{ matrix.java }}

	# ml-commons
	- name: Checkout MLCommons
	uses: actions/checkout@v2

	- name: Assemble MLCommons
	run: \|
	plugin_version=`./gradlew properties -q \| grep "opensearch_build:" \| awk '{print $2}'`
	echo plugin_version $plugin_version
	./gradlew assemble
	echo "Creating ./plugin/src/test/resources/org/opensearch/ml/bwc..."
	mkdir -p ./plugin/src/test/resources/org/opensearch/ml/bwc
	- name: Run MLCommons Backwards Compatibility Tests
	run: \|
	echo "Running backwards compatibility tests ..."
	./gradlew bwcTestSuite -Dtests.security.manager=false

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