New tracing system (#5388)

* update tracing config definitions

* new tracing system

* performance improvements

* only configure tracing in envoy if it is enabled in pomerium

* [tracing] refactor to use custom extension for trace id editing (#5420)

refactor to use custom extension for trace id editing

* set default tracing sample rate to 1.0

* fix proxy service http middleware

* improve some existing auth related traces

* test fixes

* bump envoyproxy/go-control-plane

* code cleanup

* test fixes

* Fix missing spans for well-known endpoints

* import extension apis from pomerium/envoy-custom

internal/benchmarks/latency_bench_test.go

@@ -48,6 +48,7 @@ func TestRequestLatency(t *testing.T) {
 	for i := range numRoutes {
 		routes[i] = up.Route().
 			From(env.SubdomainURL(fmt.Sprintf("from-%d", i))).
+			// Policy(func(p *config.Policy) { p.AllowPublicUnauthenticatedAccess = true })
 			PPL(fmt.Sprintf(`{"allow":{"and":["email":{"is":"user%d@example.com"}]}}`, i))
 	}
 	env.AddUpstream(up)