[Time Picker] Reconsider use of shadow

[ashetland]

Check existing issues

• [X] I have checked for existing issues to avoid duplicates

Description

Time Picker is styled with a shadow, but Date Picker and Color Picker are not. When Time Picker is used in Input Time Picker it is currently placed inside a Popover, effectively doubling its shadow.

Acceptance Criteria

To align with Color Picker and Date Picker:

• [ ] Remove shadow
• [ ] Add 1px border using border.3

Figma reference

Relevant Info

No response

Which Component

Time Picker

Example Use Case

No response

Priority impact

impact - p3 - not time sensitive

Calcite package

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

Esri team

Calcite (design)

[github-actions[bot]]

cc @geospatialem, @brittneytewks

[ashetland]

Should be paired with #9758