tests: fix compiler notices for the REPL test runner, use encoding.hex instead of the compress module in import_alias.repl

Author: spytheman

vlib/v/slow_tests/repl/import_alias.repl

@@ -1,4 +1,4 @@
-import compress.zlib as z
-z.compress('hello world'.bytes())!
+import encoding.hex as z
+z.decode('AB09CD')!.hex()
 ===output===
-[120, 1, 1, 11, 0, 244, 255, 104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100, 26, 11, 4, 93]
+ab09cd

vlib/v/slow_tests/repl/runner/runner.v

@@ -122,7 +122,7 @@ pub fn new_options() RunnerOptions {
 	mut wd := os.getwd()
 	mut files := []string{}
 	if os.args.len > 1 {
-		files = os.args[1..]
+		files = os.args[1..].clone()
 	} else {
 		os.chdir(os.dir(vexec)) or {}
 		wd = os.getwd()
@@ -140,7 +140,7 @@ pub fn new_prod_options() RunnerOptions {
 	vexec := full_path_to_v(4)
 	mut files := []string{}
 	if os.args.len > 1 {
-		files = os.args[1..]
+		files = os.args[1..].clone()
 	} else {
 		files = os.walk_ext(wd, '.prod.v')
 	}