Fix Kokoro release jobs (#4225)
Fix Kokoro release jobs (#4225)

* Fix Kokoro release jobs. Needs loopback pinentry-mode

* Skip install on deploy

* skip stagingProfileId

* Capture built artifacts

* Enable promote/drop jobs via environment variable

* Fix directory path and use -B for drop/release

* promote/drop need the settings file

* Fix path to settings file

* Update RELEASING documentation to use the Kokoro jobs

googleapis/java-cloud-bom,googleapis/java-cloud-bom,googleapis/java-cloud-bom,googleapis/java-cloud-bom