Add configuration for icon mappings and spinner mappings to show/hide their text within a table's cells

[mollykreis]

Pull Request

🤨 Rationale

This updates the nimble-mapping-icon and nimble-mapping-spinner elements to be aligned with the changes described in #1992.

👩‍💻 Implementation

• Added text-hidden to nimble-mapping-icon and nimble-mapping-spinner
  • I also added these to Blazor and Angular so that when the change is published clients in any framework can uptake the new package and have the opportunity to add text-hidden to mappings in order to keep their existing behavior
• Reworked the MappingIconConfig and MappingSpinnerConfig to be more aligned
  • They both create the appropriate ViewTemplate to render a spinner, icon, or blank
  • They both add the appropriate title and aria-* attributes based on the configuration
  • Neither adds css classes that are styled in the group header styles or cell view styles
• Update the templates for the icon column's cell view and group header share code for rendering icons and spinners (enabled because of aligning MappingIconConfig and MappingSpinnerConfig) and to render the text based on the text-hidden attribute

🧪 Testing

• Updated storybook & matrix tests
• Manually tested
• Wrote/updated a number of tests for the icon column
  • To enable this, created a page object for the icon column to encapsulate the logic around finding the icon/spinner and the text

✅ Checklist

• I have updated the project documentation to reflect my changes or determined no changes are needed.

[mollykreis]

@atmgrifter00, will you buddy this PR for me?