Speculative bump of gRPC to 1.2.1 to test for hangs

[mfojtik]

@smarterclayton compilable version of #17720... i also bumped the grpc vendored by etcd.

@liggitt @soltysh FYI

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[mfojtik]

@smarterclayton was the intent here mimic the changes in etcd-io/etcd#8867 ? I think we will require bump of etcd, don't think just the grpc bump will do the trick?

[soltysh]

+1 for etcd bump, which seems easier, esp. that we don't carry any patches anymore, iirc

[mfojtik]

/test all

[openshift-ci-robot]

@mfojtik: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/openshift-jenkins/extended_conformance_gce	57f5eaa	link	/test extended_conformance_gce
ci/openshift-jenkins/extended_conformance_install	57f5eaa	link	/test extended_conformance_install

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[smarterclayton]

I'm not sure we should be bumping the Kube gRPC version. The risk of breaking the node is too high.