`img` element with `alt` attribute

Pass Criteria

#1: Element is supported
#2: Correct HTML and Core Accessibility API mappings
#3: Correct Accessible Name & Description Calculation

Reference

Test img-001: `img` element with `alt` attribute

Test img-002: `img` element with no `alt` attribute

Test img-003: `img` element with `alt` and `aria-label` attributes

Test img-004: `img` element with `alt`, `title` and `aria-label` attributes

Test img-005: `img` element with `alt`, and `title` attributes

Test img-006: `img` element with `title` attribute, and empty `alt` attribute

Test img-007: `img` element with `title` attribute, and no `alt` attribute

HTML

Test img-008: `img` element with just whitespace in the `alt` attribute

Test img-009: `img` element with empty `alt` attribute

Test img-010: `img` element with `alt` and `alt` attributes with same text