…or semantic-role exemptions

Replaces the 3-entry hand-list (`{input type}:{role}` pairings) with a
lookup against axobject-query's `elementAXObjects` + `AXObjectRoles`
maps. Mirrors the approach used by eslint-plugin-jsx-a11y (its
`isSemanticRoleElement` util) and @angular-eslint/template.

## Why

The hand-list covered 3 pairings: `checkbox:checkbox`, `checkbox:switch`,
`radio:radio`. axobject-query encodes substantially more — including
`input[type=range]:slider`, `input[type=number]:spinbutton`,
`input[type=text]:textbox`, `input[type=search]:searchbox`. Each of
these is a case where the native element already provides the role's
required ARIA state (e.g., `<input type=range>` provides value via its
native `value` attribute, satisfying `role=slider`'s `aria-valuenow`
requirement).

Using axobject-query directly:
- Gives us strict superset coverage of the hand-list.
- Stays in sync when axobject-query updates (the hand-list had already
  drifted — the earlier revision incorrectly claimed menuitemcheckbox
  / menuitemradio pairings were in axobject-query when they aren't).
- Matches jsx-a11y / angular-eslint behavior, closing a documented
  parity gap.

Adds `axobject-query@^4.1.0` as a direct dep. It's already a transitive
dep via other ecosystem packages; this elevates it to first-class.

## Changes

- `lib/rules/template-require-mandatory-role-attributes.js` — replace
  `NATIVELY_CHECKED_INPUT_ROLE_PAIRS` + `isNativelyChecked` with
  `isSemanticRoleElement` that walks `elementAXObjects` and checks
  `AXObjectRoles`. Handles both `GlimmerElementNode` (angle-bracket
  syntax) and `GlimmerMustacheStatement` (classic `{{input}}` helper).
- `package.json` — add `axobject-query@^4.1.0`.
- `tests/lib/rules/template-require-mandatory-role-attributes.js` —
  add tests for the broadened coverage (`<input type=range role=slider>`
  now valid in both gts and hbs forms).
- `docs/rules/template-require-mandatory-role-attributes.md` — rewrite
  the exemption section to describe the axobject-query-backed lookup
  with a table of known pairings.

…imary source

axobject-query is the data package the rule queries, but the normative
source for "native <input type=checkbox> exposes aria-checked via the
checked IDL attribute" is HTML-AAM §el-input-checkbox. Adding the HTML-AAM
link makes the exemption's spec grounding explicit instead of leaving
axobject-query as a free-floating data source.

… perf (Copilot review)

…e cases, drop audit fixture

Upstream maintainers don't want the per-PR `tests/audit/peer-parity`
pattern. Port the documented divergences from peer plugins (jsx-a11y,
vue-a11y, angular-eslint) into the regular suite as VALID cases that
pin our current behavior:
- `role="combobox listbox"` (space-separated tokens — peers split,
  we don't)
- `role="COMBOBOX"` / `role="SLIDER"` (case-insensitivity — peers
  lowercase before lookup, we don't)
- `role="foobar"` (unknown — parity)

Other audit cases were already covered by the regular tests or were
pure peer-plugin restatements.