Audit `heading`/`label` props for consistency

[jcfranco]

Description

We should look at current label prop names for consistency. The following are some common types:

1. heading-related (suggested heading)
2. icon text/content?(suggested `text)
3. a11y-specific (suggested label)

There might be others, but these are some that immediately stand out.

Proposed Advantages

Consistency across item components.

Which Component

a11y

• action-bar, action-pad: actionsEndGroupLabel
• action-group, action, avatar, button, card, checkbox, chip, dropdown-item, fab, input-number, input-text, input, list, navigation-logo, navigation-user, option, progress, switch, text-area, tile, tooltip: label
• icon: textLabel
• slider: maxLabel, minLabel
• split-button: dropdownLabel, primaryLabel

headings

• accordion-item, flow-item, list-item-group, navigation-logo, panel, popover, stepper-item, table-header, tile: heading
• block-section: text
• combobox-item: textLabel
• dropdown-group: groupTitle
• list-item: label
• ~tip-group, tip-manager, pick-list-group~ (deprecated): groupTitle
• ~tile-select, tip~: heading

icon text/content

• action, fab, menu-item, progress: text
• input, input-number, input-text: prefixText, suffixText
• list: filterText
• navigation: label
• split-button: primaryText,
• ~pick-list, value-list~ (deprecated): filterText

Relevant Info

No response

Calcite package

• [X] @esri/calcite-components
• [ ] @esri/calcite-components-angular
• [ ] @esri/calcite-components-react
• [ ] @esri/calcite-design-tokens
• [ ] @esri/eslint-plugin-calcite-components

[macandcheese]

Somewhat related https://github.com/Esri/calcite-design-system/issues/8926

[driskull]

This would be nice to do.

I did notice combobox-item has label, heading, and description but combobox-item-group only has label.

it would be nice if these were consistent.