feat: Add HashiCorp Vault integration for OpenMetadata secrets manage…

[spomytkin]

…ment

• Add comprehensive HashiCorp Vault credentials JSON schema with support for multiple auth methods (token, AppRole, AWS, Kubernetes, UserPass, LDAP)
• Implement Python HashiCorp Vault secrets manager using hvac library with full authentication support
• Implement Java HashiCorp Vault secrets manager for server-side operations using HttpClient
• Support both KV v1 and KV v2 secrets engines with proper path handling
• Add SSL/TLS configuration options including custom certificates and mTLS
• Update secrets manager factory classes to include HashiCorp Vault provider
• Add hvac>=1.0.0 dependency to Python ingestion setup
• Include comprehensive unit tests with mock-based Vault API testing
• Add complete documentation with setup guides, authentication examples, and troubleshooting
• Follow existing OpenMetadata patterns from Kubernetes vault implementation (PR Fix #22511: k8s secret support for Secrets Manager open-metadata/OpenMetadata#22516)

Describe your changes:

Improvement

I worked on HashiCorp Vault integration because it requred in prod.

Type of change:

• Improvement

Checklist:

• I have read the CONTRIBUTING document.
• I have commented on my code, particularly in hard-to-understand areas.
• For JSON Schema changes: I updated the migration scripts or explained why it is not needed.