[MATRIX-1286] Add new connection s3vectors

[xli1996]

Release Notes

New Features

• Add "s3vectrors" connection type support for confluent flink connection

Checklist

• I have successfully built and used a custom CLI binary, without linter issues from this PR.
• I have clearly specified in the What section below whether this PR applies to Confluent Cloud, Confluent Platform, or both.
• I have verified this PR in Confluent Cloud pre-prod or production environment, if applicable.
• I have verified this PR in Confluent Platform on-premises environment, if applicable.
• I have attached manual CLI verification results or screenshots in the Test & Review section below.
• I have added appropriate CLI integration or unit tests for any new or updated commands and functionality.
• I confirm that this PR introduces no breaking changes or backward compatibility issues.
• I have indicated the potential customer impact if something goes wrong in the Blast Radius section below.
• I have put checkmarks below confirming that the feature associated with this PR is enabled in:
  • Confluent Cloud prod
  • Confluent Cloud stag
  • Confluent Platform
  • Check this box if the feature is enabled for certain organizations only

What

Add new flink s3vectors connection, this pr applies to CC.

Blast Radius

Minimal. This additive change should only affect new s3vectors type connection introduced by this PR.

References

Test & Review

[confluent-cla-assistant]

🎉 All Contributor License Agreements have been signed. Ready to merge.
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}

[sonarqube-confluent]

Quality Gate passed

Issues
4 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube

[Copilot]

Pull request overview

This PR adds support for two new Flink connection types: "cosmosdb" and "s3vectors" to the Confluent CLI. The changes enable users to create and manage connections to Azure Cosmos DB using API keys and AWS S3 Vectors using AWS credentials.

Changes:

• Added "cosmosdb" and "s3vectors" to the list of supported connection types
• Updated authentication parameter mappings for both new connection types
• Added test cases and golden fixtures for the new connection types

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/flink_test.go	Added test cases for creating cosmosdb and s3vectors connections
test/fixtures/output/flink/connection/create/create-s3vectors.golden	Golden file showing expected output for s3vectors connection creation
test/fixtures/output/flink/connection/create/create-cosmosdb.golden	Golden file showing expected output for cosmosdb connection creation
test/fixtures/output/flink/connection/*.golden	Updated help text and error messages to include new connection types
pkg/flink/utils.go	Added cosmosdb and s3vectors to connection type mappings and authentication configurations
cmd/lint/main.go	Added new connection type names to vocabulary whitelist

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