Deprecate Number Input

[micahchiang]

Description

The va-number-input component has incrementally expanded in function to the point where there is little difference between the purpose it serves and that which our va-text-input fills. Even now, issues exist for requests to broadened the abilities va-number-input offers. With this, the va-number-input will be deprecated, and it's existing functionality will be subsumed by the va-text-input.

This is a multi-step process that will involve:

1. Updating the va-text-input component with any va-number-input functionality it doesn't already cover
2. Updating the storybook guidance for va-text-input
3. Providing teams with a timeline and migration plan for when va-number-input will be replaced in vets-website
4. Releasing the update to vets-website.

Considerations:

• There are currently 28 combined instances of va-number-input and VaNumberInput being used in vets-website