Review modifications suggested by @ashutosh-narkar

* Changing `ParserOptions.RegoV1Compatible` take precedence over `ParserOptions.RegoVersion`
* Fixing comment in test
* Updating `fmt --rego-v1` CLI description
* Adding back `Opts.RegoV1` and deprecating.
  * Making `Opts.RegoV1` take precedence over `Opts.RegoVersion`
* `TestPartialWitRegoV1` -> `TestPartialWithRegoV1`
* removing `Println` in test

Signed-off-by: Johan Fylling <johan.dev@fylling.se>

rego/rego_test.go

@@ -1229,8 +1229,6 @@ foo[__local1__1] { __local1__1 = input.v }`,
 				t.Fatal(err)
 			}
 
-			fmt.Println(partialQuery)
-
 			actualQuery := partialQuery.Queries[0].String()
 			if tc.expQuery != actualQuery {
 				t.Fatalf("Expected partial query to be:\n\n%s\n\nbut got:\n\n%s", tc.expQuery, actualQuery)