chore(GHA): add action for testing against MPL HEAD #18

Job	Run time
getMplHeadVersion / getMplHeadVersion	12s
getVerifyVersion / getDafnyVerifyVersion	6s
getVersion / getDafnyVersion	5s
mpl-head-ci-format / format_projects (macos-12)	3m 17s
mpl-head-ci-test-vector-verification / verification (macos-12)	7m 52s
mpl-head-ci-verification / verification (DynamoDbEncryption, macos-12)	4m 50s
mpl-head-ci-verification / verification (DynamoDbEncryptionTransforms, macos-12)	18m 38s
mpl-head-ci-verification / verification (DynamoDbItemEncryptor, macos-12)	1m 49s
mpl-head-ci-java / testJava (DynamoDbEncryption, 8, macos-12)	6m 47s
mpl-head-ci-verification / verification (StructuredEncryption, macos-12)	2m 32s
mpl-head-ci-java / testJava (DynamoDbEncryption, 11, macos-12)	8m 6s
mpl-headci-java-examples / testJava (8, macos-12)	9m 35s
mpl-head-ci-java / testJava (DynamoDbEncryption, 16, macos-12)	7m 7s
mpl-headci-java-examples / testJava (11, macos-12)	13m 40s
mpl-head-ci-java / testJava (DynamoDbEncryption, 17, macos-12)	6m 21s
mpl-headci-java-examples / testJava (16, macos-12)	8m 11s
mpl-head-ci-java-test-vectors / testJava (TestVectors, 8, ubuntu-latest)	8m 32s
mpl-headci-java-examples / testJava (17, macos-12)	10m 20s
mpl-head-ci-java-test-vectors / testJava (TestVectors, 11, ubuntu-latest)	8m 38s
mpl-head-ci-java-test-vectors / testJava (TestVectors, 16, ubuntu-latest)	8m 10s
mpl-head-ci-java-test-vectors / testJava (TestVectors, 17, ubuntu-latest)	8m 0s
	2h 22m 48s

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