vlib: use malloc_noscan() where possible (#10465)

vlib/crypto/rand/rand_solaris.c.v

@@ -14,7 +14,7 @@ const (
 
 // read returns an array of `bytes_needed` random bytes read from the OS.
 pub fn read(bytes_needed int) ?[]byte {
-	mut buffer := unsafe { malloc(bytes_needed) }
+	mut buffer := unsafe { malloc_noscan(bytes_needed) }
 	mut bytes_read := 0
 	mut remaining_bytes := bytes_needed
 	// getrandom syscall wont block if requesting <= 256 bytes