Factor out a builder to handle common integration test arguments (#8733)

## Summary

This refactors the `ruff_cli` integration tests to create a new
`RuffCheck` struct -- this holds options to configure the "common case"
flags that we want to pass to Ruff (e.g. `--no-cache`, `--isolated`,
etc). This helps reduce the boilerplate and (IMO) makes it more obvious
what the core logic of each test is by keeping only the "interesting"
parameters.

## Test Plan

`cargo test`

crates/ruff_cli/tests/format.rs

@@ -77,7 +77,7 @@ bar =     "needs formatting"
 #[test]
 fn format_warn_stdin_filename_with_files() {
     assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
-        .args(["format", "--stdin-filename", "foo.py"])
+        .args(["format", "--isolated", "--stdin-filename", "foo.py"])
         .arg("foo.py")
         .pass_stdin("foo =     1"), @r###"
     success: true