Upload Jib CLI release archive for JRE and its SHA checksum (#2946)
Upload Jib CLI release archive for JRE and its SHA checksum (#2946)

* Upload Jib CLI archive in release process
* Build on the release branch
* Check out the right tag for building
* Check version string
* Set PR title and body
GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib