NetworkPkg/HttpDxe: Add HttpEventTlsConfigured HTTP callback event

Add HttpEventTlsConfigured HTTP callback event and notify
callback functions when TlsConfigureSession () returns.

Signed-off-by: Abner Chang <abner.chang@amd.com>
Cc: Saloni Kasbekar <saloni.kasbekar@intel.com>
Cc: Zachary Clark-williams <zachary.clark-williams@intel.com>
Cc: Michael Brown <mcb30@ipxe.org>
Cc: Nickle Wang <nicklew@nvidia.com>
Cc: Igor Kulchytskyy <igork@ami.com>
Reviewed-by: Michael Brown <mcb30@ipxe.org>
Reviewed-by: Saloni Kasbekar <saloni.kasbekar@intel.com>

NetworkPkg/HttpDxe/HttpProto.c

@@ -1418,6 +1418,7 @@ HttpInitSession (
   //
   if (TlsConfigure) {
     Status = TlsConfigureSession (HttpInstance);
+    HttpNotify (HttpEventTlsConfigured, Status);
     if (EFI_ERROR (Status)) {
       return Status;
     }