fix(gcpPublishEvent): Error handling in non-standard Vault cases

[jliempt]

Changes

The step doesn't terminate properly when a Vault client can't be created.

• [ ] Tests
• [ ] Documentation

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[jliempt]

/it-go