vendor: update grpc-go and update non-pinned deps

Switch from Peter's fork of grpc to my own fork, since Peter's out of
office. My fork is https://github.com/grpc/grpc-go head + Peter's one
commit increasing the per-stream flow-control window.

The motivation of syncing to newer gRPC is to include grpc/grpc-go#993
for helping with cockroachdb#13989 - we will move to gRPC internal heartbeats
instead of using our own connection heartbeats in a future cockroach
commit.

Other dep updates:
- the Lightstep update is a single commit that seems innocuous

glide.yaml

@@ -15,8 +15,8 @@ import:
 # https://github.com/grpc/grpc-go/issues/760
 # https://github.com/grpc/grpc-go/issues/1043
 - package: google.golang.org/grpc
-  version: d3f1ab4a4dca70781cf6dc850a79ed38632660a6
-  repo: https://github.com/petermattis/grpc-go
+  version: 9d55a95b90eb10d08a07e0213d23797dbd7b7552
+  repo: https://github.com/andreimatei/grpc-go
 # Pins to prevent unintended version changes to libs we care about when adding/
 # removing/changing other deps. These are grouped separately to make it easier
 # to comment them out in bulk when running an across-the-board dep update.

pkg/cli/cli_test.go

@@ -297,11 +297,11 @@ communicate with a secure cluster\).
 		// Error returned from GRPC to internal/client (which has to pass it
 		// up the stack as a roachpb.NewError(roachpb.NewSendError(.)).
 		{`debug kv inc a`, styled(
-			`increment failed: failed to send RPC: rpc error: code = 14 desc = grpc: the connection is unavailable`),
+			`increment failed: failed to send RPC: rpc error: code = Unavailable desc = grpc: the connection is unavailable`),
 		},
 		// Error returned directly from GRPC.
 		{`quit`, styled(
-			`rpc error: code = 14 desc = grpc: the connection is unavailable`),
+			`rpc error: code = Unavailable desc = grpc: the connection is unavailable`),
 		},
 		// Going through the SQL client libraries gives a *net.OpError which
 		// we also handle.