chore(builtins): sync uutils/coreutils argument surfaces and vendored modules

[chaliy]

What changed

Regenerated the ported coreutils argument surfaces and the vendored uucore::format
module against uutils/coreutils@8613dffab (was 6579cc2), bumping
UUTILS_REVISION and the 20 generated files together.

Utilities: cat ls mktemp od readlink realpath shuf stat tac tee truncate.
Vendored module: format.

format module — inert in bashkit

• EscapeSet (new) — parse_escape_code/parse_escape_only now take an escape-set
  argument selecting whether \", \u and \U are escapes. Both vendored call sites
  (parse_spec_and_escape for format strings, %b in spec.rs) pass
  WithUnicodeAndQuote, which is exactly what the code did unconditionally before. The
  WithoutUnicodeAndQuote arm is upstream's echo-style path and is unreachable from bashkit.
• %q — moves from locale_aware_escape_name(.., SHELL_ESCAPE) to upstream's new
  locale_aware_shell_escape shorthand. The shim routes both to the same shell_quote.
• QuotingStyle::C_NO_QUOTES → QuotingStyle::Escape — the rename the shim
  pre-absorbed in fix(builtins): track uucore quoting-style rename in printf shim #2738; both map to the same no-op escaping, and
  DIAGNOSTIC_QUOTING_STYLE already named the new spelling, so printf's
  diagnostic prefix-matching stays in step.
• set_exit_code — calls move into the per-error match arms. It is a no-op in
  bashkit, which reports status through ExecResult.
• Float formatting — format_float_decimal/format_float_scientific gain upstream's
  bounded zero-padding: fractional digits capped at u16::MAX, and integer
  zero-extension refused past the existing MAX_FORMAT_WIDTH (1M) instead of formatting
  at an unbounded precision. This tightens a resource bound rather than loosening one.

Argument surfaces — two small accepted-input changes

ls and od build their clap commands from the generated definitions, so these are
user-visible at the parsing layer:

• od gains -B as a short alias for --skip-bytes, and its help text changes
  Skip bytes input bytes → Skip BYTES input bytes. -B is newly accepted.
• ls drops the mutual overrides_with between --dired and --hyperlink, and
  --hyperlink=c-maybe becomes its own possible value rather than an alias of c.
  bashkit's ls implementation reads neither flag (both parse and are ignored), so the
  observable result is unchanged; only which combinations clap accepts shifts.

Everything else in the *_args.rs files is the revision header.

Why

This is the drift the weekly coreutils-args-drift run had been detecting but never
surfacing. The run was failing outright since the uucore quoting-style rename (fixed in
#2738), and its PR path edited a closed PR instead of opening one (fixed in #2745). With
both repaired, this is the backlog that had accumulated — regenerated by the workflow
itself (run 39019907688),
not by hand.

Before / After

Because %b/%q/float formatting were the paths most exposed, the same 20 printf cases
were run against real bash (5.2.21) with the generated tree before and after this
change, built from the same tree otherwise:

	pass	fail
Pre-drift (main)	17	3
Post-drift (this PR)	17	3

The three divergences are byte-identical before and after, so none is introduced here:

printf '%b\n' 'q\"q'            bash: q\"q                   bashkit: q"q
printf '%b\n' 'x\U0001F600y'    bash: x\U0001F600y           bashkit: x😀y
printf '%q\n' 'com espaço'      bash: $'com espa\303\247o'   bashkit: com\ espaço

These are pre-existing, intentional bashkit-vs-bash differences (bashkit's printf follows
coreutils semantics for \u/\U and %q), unrelated to this sync.

Other validation on the regenerated tree:

• cargo build -p bashkit clean; cargo fmt --check clean.
• cargo test -p bashkit --lib → 3061 passed.
• cargo test -p bashkit --test integration -- spec_tests → 4 passed (bash/awk/grep/sed spec suites).
• cargo test -p bashkit --test integration -- printf → 18 passed.
• knowledge/status/builtins.json needs no regeneration: it records {feature, name} per
  builtin (230 entries) and carries no flag-level detail, so the ls/od arg changes
  cannot drift it.
• The drift run itself built the uutils multicall from the same tree and ran the
  BASHKIT_RUN_COREUTILS_DIFF=1 differential harness and cat/tac spec tests.

The strict host-bash/grep/sed comparison gates are #[ignore]d locally and run in CI
(ci.yml), so they are covered by this PR's own CI rather than reproduced here.

Risk

• Low. Generated-only diff, confined to crates/bashkit/src/builtins/generated/. No
  hand-written code, no public API, no feature flags touched.
• The float-formatting change narrows an allocation bound; the escape-set change is a
  no-op at both call sites, as the differential above shows.
• The od -B alias widens accepted input by one flag, matching upstream.

Checklist

• Tests added or updated — existing printf/format/spec/ls/od suites cover these paths;
  the change is a regeneration with no new code paths reachable from bashkit
• Backward compatibility considered

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