Spring-ai Add LocalStack OpenSearch Service Connection support for Docker Compose and Testcontainers

• Add property spring.ai.vectorstore.opensearch.aws.domain-name
• Require AwsCredentialsProvider to enable AwsOpenSearchConfiguration
• Add Testcontainers Service Connection support
• Add Docker Compose Service Connection support

Comment From: ilayaperumalg

@eddumelendez Thanks for the PR! The changes look good to me. Ran the tests locally to validate, rebased and merged as 6261ce02