int tests for anthos env (GONRG-4979)

provider/partition-gcp/README.md

provider/partition-gcp/docs/anthos/README.md

provider/partition-gcp/docs/gcp/README.md

testing/partition-test-anthos/pom.xml

...org/opengroup/osdu/partition/api/TestCreatePartition.java

...org/opengroup/osdu/partition/api/TestDeletePartition.java

...rg/opengroup/osdu/partition/api/TestGetPartitionById.java

.../org/opengroup/osdu/partition/api/TestGetVersionInfo.java

.../org/opengroup/osdu/partition/api/TestListPartitions.java

...org/opengroup/osdu/partition/api/TestUpdatePartition.java

.../osdu/partition/api/util/AnthosAuthorizationTestUtil.java

...va/org/opengroup/osdu/partition/util/AnthosTestUtils.java

...rg/opengroup/osdu/partition/util/OpenIDTokenProvider.java

...ngroup/osdu/partition/util/conf/OpenIDProviderConfig.java

...partition-test-anthos/src/test/resources/logback-test.xml

testing/pom.xml