ls: avoid leading quote-alignment space for colored names

[paolo-losi]

Summary

• Strip leading ANSI CSI sequences before checking whether a displayed name visibly starts with a quote.
• Use the same quote-prefix predicate for column and long-format quote alignment.
• Add regression coverage for --color=always with quoted names in both column and long output.

Fixes #12432.

Tests

cargo fmt --check
cargo test --test tests test_ls_color_does_not_make_quoted_names_align_as_unquoted
cargo test --test tests test_ls_align_unquoted
cargo test --test tests test_ls_color

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/cut/bounded-memory (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/cut/cut-huge-range is now passing!