hash: add more methods to the hash.Hash interface, to match the ones …

…in Go (#22001)

vlib/hash/hash.v

@@ -4,11 +4,15 @@
 module hash
 
 pub interface Hash {
+mut:
 	// Sum appends the current hash to b and returns the resulting array.
 	// It does not change the underlying hash state.
 	sum(b []u8) []u8
 	size() int
 	block_size() int
+	free()
+	reset()
+	write(p []u8) !int
 }
 
 interface Hash32er {