Hashicorp Vault Integration

[tomas-langer]

Epic for HCP Vault integration.

TODO:

• Vault Integration - Documentation #2961 Add documentation
• Vault Integration - Native Image #2962 Validate native image in MP
• Vault Integration - Tracing #2963 Check and document integration with Tracing
• Vault Integration - Health Checks #2964 Check and document integration with HealthChecks (maybe add a health check for OCI?)
• Vault Integration - Metrics #2965 Check and document integration with Metrics

DONE (#2895)

• Add Support of Hashicorp Vault into Helidon #2395 Add Support of Hashicorp Vault into Helidon
• Add CDI support for reactive interfaces, so this can be tested in an MP application
• Add blocking APIs + CDI support for injecting them
• Validate all modules exist in bom/pom.xml
• Add CDI examples
• Validate reactive examples work with native-image
• Update FeatureCatalog with the new modules
• Validate module-info.java exists for all modules (except for examples)
• Integration test using k8s authentication and database secrets with MySQL

[tomas-langer]

Closing this epic. The basic integration is done, missing features are prioritized.