Use snapshots for remaining lexer tests (#7264)

## Summary

This PR updates the remaining lexer test cases to use the snapshots.
This is mainly a mechanical refactor.

## Motivation

The main motivation is so that when we add the token range values to the
test case output, it's easier to update the test cases.

The reason they were not using the snapshots before was because of the usage of
`test_case` macro. The macros is mainly used for different EOL test cases. If we
just generate the snapshots directly, then the snapshot name would be suffixed
with `-1`, `-2`, etc. as the test function is still the same. So, we'll create
the snapshot ourselves with the platform name for the respective EOL
test cases.

## Test Plan

`cargo test`

crates/ruff_python_parser/Cargo.toml

@@ -30,7 +30,6 @@ static_assertions = "1.1.0"
 
 [dev-dependencies]
 insta = { workspace = true }
-test-case = { workspace = true }
 
 [build-dependencies]
 anyhow = { workspace = true }