Add attested Consul mesh admission example #3

Job	Run time
build (sidecar, consul-postgres-ha/sidecar)	16s
build (patroni, consul-postgres-ha/patroni)	27s
build (mesh-conn, consul-postgres-ha/mesh-conn)	26s
build (webdemo, consul-postgres-ha/webdemo)	26s
build (bootstrap-secrets, consul-postgres-ha/bootstrap-secrets)	22s
build (signaling, consul-postgres-ha/signaling)	17s
	2m 14s

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