fix: Log request payload

[Sanskarzz]

when i executed with command curl -X POST -d '{"key": "value"}' -H "Content-Type: application/json" http://127.0.0.1:8000
The result where

sanskar@sanskar-HP-Laptop-15s-du1xxx:~/kyverno-envoy-plugin$ go run main.go 
Starting HTTP server on Port 8000
Starting GRPC server on Port 9000
Received request from 127.0.0.1:51952 /
Request payload: {"key": "value"}

Test with istio demo
Request -

sanskar@sanskar-HP-Laptop-15s-du1xxx:~/kyverno-envoy-plugin$ kubectl run test -it --rm --restart=Never --image=busybox -- wget -q --output-document - echo.demo.svc.cluster.local:8080/foo

If you don't see a command prompt, try pressing enter.
warning: couldn't attach to pod/test, falling back to streaming logs: Internal error occurred: error attaching to container: failed to load task: no running task found: task b774615d16d54e33d7853d49d28f35a29fe23d9967d2f88fb10515167b1eb836 not found: not found
{
  "path": "/foo",
  "headers": {
    "host": "echo.demo.svc.cluster.local:8080",
    "user-agent": "Wget",
    "x-forwarded-proto": "http",
    "x-request-id": "07e0fa25-e3f9-4a89-aaa5-e7dfb777e344",
    "x-b3-traceid": "3d63b0fd625a274ab26667455c817009",
    "x-b3-spanid": "b26667455c817009",
    "x-b3-sampled": "0"
  },
  "method": "GET",
  "body": "",
  "fresh": false,
  "hostname": "echo.demo.svc.cluster.local",
  "ip": "::ffff:127.0.0.6",
  "ips": [],
  "protocol": "http",
  "query": {},
  "subdomains": [
    "svc",
    "demo",
    "echo"
  ],
  "xhr": false,
  "os": {
    "hostname": "echo-6847f9f85-vpqqg"
  },
  "connection": {}
}pod "test" deleted

Log stream -

sanskar@sanskar-HP-Laptop-15s-du1xxx:~$ kubectl logs "$(kubectl get pod -l app=ext-authz -n demo -o jsonpath={.items..metadata.name})" -n demo -c ext-authz -f 
Starting HTTP server on Port 8000
Starting GRPC server on Port 9000
Header: :authority = echo.demo.svc.cluster.local:8080
Header: :scheme = http
Header: x-request-id = 07e0fa25-e3f9-4a89-aaa5-e7dfb777e344
Header: :path = /foo
Header: :method = GET
Header: x-forwarded-proto = http
Header: user-agent = Wget
Attributes: source:{address:{socket_address:{address:"10.244.0.11" port_value:50680}}} destination:{address:{socket_address:{address:"10.244.0.6" port_value:8080}}} request:{time:{seconds:1710516646 nanos:879496000} http:{id:"198740000404024245" method:"GET" headers:{key:":authority" value:"echo.demo.svc.cluster.local:8080"} headers:{key:":method" value:"GET"} headers:{key:":path" value:"/foo"} headers:{key:":scheme" value:"http"} headers:{key:"user-agent" value:"Wget"} headers:{key:"x-forwarded-proto" value:"http"} headers:{key:"x-request-id" value:"07e0fa25-e3f9-4a89-aaa5-e7dfb777e344"} path:"/foo" host:"echo.demo.svc.cluster.local:8080" scheme:"http" protocol:"HTTP/1.1"}} metadata_context:{} route_metadata_context:{}