fix(time-picker): high contrast visibility of outlines in focus and hover states

[mpriour]

Related Issue: #6118

Summary

• ensures that outlines are fully visible in high contrast
• Adds a z-index to the buttons and inputs in hover or focus state
• Does not have any noticeable change in regular contrast mode

[mpriour]

@benelan & @geospatialem I'm not sure how I messed up the semantic PR but I know I did not do anything to the E2E tests that are preventing the checks from passing.

[geospatialem]

I'm not sure how I messed up the semantic PR

@mpriour I'm not sure if this'll fix it, but might need to add the component to the fix. Something like:

fix(time-picker): high contrast visibility of outlines in focus and hover states

did not do anything to the E2E tests that are preventing the checks from passing.

Will look into the e2e test failure, might just need to re-run them. 🏃🏻 But agreed, does not apply to this fix. Update: Re-ran the e2e tests and the PR is good to go now.

Going to take a peek at the fix now, thanks for taking a look @mpriour! cc #3887

[geospatialem]

Looking great! ✨

Noticed when using input-time-picker the first and last items outline extends a bit outside the component. Very minor, and the time-picker looks good by itself, but wanted to mention if its something we should address in this PR.

[mpriour]

@geospatialem It looks like I can remove the outline offset and shrink the focus ring in high-contrast mode to just be the size of the input.

[mpriour]

@geospatialem Looks like all the pre-merge checks have passed. Take another look when you get a chance and verify that the focus ring doesn't overlap other parts of the UI in high contrast mode.

[geospatialem]

Looks great in high contrast mode, and in normal viewing mode! 💥

Just need a dev sign off on the updated code style changes.

[driskull]

LGTM! 👍

[mpriour]

@benelan @driskull - All checks have passed and required code reviewers have approved code. Why can I not squash merge this PR at this time?

[benelan]

We have some unstable visual regression tests that were blocking merging. I just cleared those up, so its ready to install. Thanks for the contribution!