feat(iam-setup): additional support for iam

[david-leifker]

Summary

Updates for IAM Support

Changes Made

Fixes

• ✅ MCE Consumer should share cloud detection logic with GMS/SystemUpdate

SQL Setup Configuration

• ✅ Removed incorrect IAM_ROLE environment variable - IAM authentication is now auto-detected
• ✅ Added DATAHUB_SQL_SETUP_ENABLED - enables SQL setup functionality without CLI arguments
• ✅ Updated IAM authentication documentation with correct auto-detection logic

Elasticsearch User Create

• ✅ Optionally create an Elasticsearch user or role mapping and policy

Cloud Provider Configuration

• ✅ Added AWS_SESSION_TOKEN - for temporary AWS credentials
• ✅ Added GCP_PROJECT - for GCP project auto-detection

Impact

Documents all environment variables used by datahub-upgrade sql-setup and elasticsearch upgrade steps, correcting IAM authentication behavior.

Important Notes

Primarily tested RDS MySQL + AWS IAM

[codecov]

Bundle Report

Bundle size has no change ✅

[codecov]

Codecov Report

❌ Patch coverage is 80.57971% with 67 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...rade/system/elasticsearch/util/IndexRoleUtils.java	79.39%	31 Missing and 10 partials ⚠️
...inkedin/gms/factory/common/CrossCloudIamUtils.java	76.11%	3 Missing and 13 partials ⚠️
...ade/system/elasticsearch/steps/CreateUserStep.java	93.47%	1 Missing and 2 partials ⚠️
...om/linkedin/metadata/restli/EbeanServerConfig.java	57.14%	1 Missing and 2 partials ⚠️
...edin/datahub/upgrade/sqlsetup/CreateUsersStep.java	71.42%	0 Missing and 2 partials ⚠️
...atahub/upgrade/sqlsetup/config/SqlSetupConfig.java	88.88%	0 Missing and 1 partial ⚠️
...in/gms/factory/common/LocalEbeanConfigFactory.java	66.66%	0 Missing and 1 partial ⚠️

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