Add service external traffic policy

[jeonsavvy]

Pull request description

Adds optional <product>.service.externalTrafficPolicy support across Jira, Confluence, Bamboo, Bitbucket, and Crowd Service templates. The value only renders for NodePort and LoadBalancer services to avoid producing invalid ClusterIP Service specs. The values files, README tables, and parameterized Service test are updated with the new setting.

Fixes #1085.

Validation

• git diff --check
• helm template render check for jira, confluence, bamboo, bitbucket, and crowd with service.type=NodePort and service.externalTrafficPolicy=Local
• C:\PROJECT\tools\apache-maven-3.9.11\bin\mvn.cmd -Dtest=ServiceTest test — Tests run: 36, Failures: 0, Errors: 0, Skipped: 0, BUILD SUCCESS

Checklist

• I have added unit tests
• I have applied the change to all applicable products
• The E2E test has passed (use e2e label)

[atlassian-cla-bot]

Hooray! All contributors have signed the CLA.