Unable to tsh ssh or tsh ls in 13.0.0-alpha.2

[rosstimothy]

tsh ls and tsh ssh are non-functional when Auth and Proxy running 13.0.0-alpha.2.

These both use the Proxy gRPC api instead of the Proxy SSH api for connecting the to cluster.

tsh ls
ERROR REPORT:
Original Error: *trace.TraceErr connection error: desc = "transport: authentication handshake failed: failed to receive from source: failed dialing cluster \"proxy.com\"\n\tunable to send signed PROXY header to auth server"
Stack Trace:
	github.com/gravitational/teleport/[email protected]/client/client.go:2848 github.com/gravitational/teleport/api/client.GetResourcePage[...]
	github.com/gravitational/teleport/[email protected]/client/client.go:2898 github.com/gravitational/teleport/api/client.GetAllResources[...]
	github.com/gravitational/teleport/lib/client/api.go:2183 github.com/gravitational/teleport/lib/client.(*TeleportClient).ListNodesWithFilters
	github.com/gravitational/teleport/tool/tsh/tsh.go:2023 main.onListNodes.func1
	github.com/gravitational/teleport/lib/client/api.go:524 github.com/gravitational/teleport/lib/client.RetryWithRelogin
	github.com/gravitational/teleport/tool/tsh/tsh.go:2022 main.onListNodes
	github.com/gravitational/teleport/tool/tsh/tsh.go:1194 main.Run
	github.com/gravitational/teleport/tool/tsh/tsh.go:507 main.main
	runtime/proc.go:250 runtime.main
	runtime/asm_amd64.s:1598 runtime.goexit
User Message: connection error: desc = "transport: authentication handshake failed: failed to receive from source: failed dialing cluster \"proxy.com\"\n\tunable to send signed PROXY header to auth server"