Add `line:column` information to source code references produced by the parser. This information will be used by GUI2 as part of the solution to #8134.
# Important Notes
- `parse_all_enso_files.sh` has been used to ensure this doesn't affect tree structures.
- `parse_all_enso_files.sh` now checks emitted locations for consistency, and has been used to verify that all line:col references match the values found by an independent scan of the source up to the given UTF8 position.
Resolve macros eagerly. Improves performance; allows parser to handle arbitrarily-long lines (fixes#7691).
# Important Notes
- A new utility, `lib/rust/parser/debug/tools/parse_all_enso_files.sh`, supports comparing ASTs parsed with different versions of the parser. This tool has been used to verify that this refactor doesn't change the result of parsing any standard library or test file.
