Avoid overwriting context in deploy.sh.
Avoid overwriting context in deploy.sh.

This makes it easier to work with multiple clusters, as you won't be
surprised by the current context changing.

This is a second attempt that handles failure of `kubectl config
current-context`.

Change-Id: I57b156d8c1a0ecc6c0db1daf633d8727f73021c0
GitOrigin-RevId: 6c6eb62738fab06fcad01194cae47193229f7a3c

googlecloudrobotics/core,googlecloudrobotics/core,googlecloudrobotics/core