Clone OriginInfo in Path Clone

OriginInfo assigned to Path objects is a pointer to the originating
peer's info, which is populated by the FSM goroutine handling the peer's
connection. This value is typically protected by the FSM lock, but in
the event a path watch is running, it gets converted to a protobuf
object in toPathAPI in a separate goroutine. This method reads from this
same structure without any data synchronisation, leading to a data
race.

To ensure this cannot happen, this commit adds a line to clone the field
before it is passed to the event watcher, ensuring the data race cannot
occur.

internal/pkg/table/path.go

@@ -328,11 +328,14 @@ func (path *Path) IsIBGP() bool {
 
 // create new PathAttributes
 func (path *Path) Clone(isWithdraw bool) *Path {
+	newOriginInfo := *path.info
+
 	return &Path{
 		parent:           path,
 		IsWithdraw:       isWithdraw,
 		IsNexthopInvalid: path.IsNexthopInvalid,
 		attrsHash:        path.attrsHash,
+		info:             &newOriginInfo,
 	}
 }