DP-31793 Header alerts

[ygannett]

Any PRs being created needs a changelog.txt file before being merged into dev. See: Change Log Instructions

Description

• Add a border to the alert header button
• Change the border for alert item container to match the styles to the header button
• Change the icon for notice (yellow one) in alert items

Related Issue / Ticket

• JIRA issue
• Github issue

Steps to Test

1. Go to the park location page or header alert component.
2. Find the component has a gray border.
3. Find the border doesn't add up (= get thicker) when it has multiple alert items.
4. The icon for the notice is charged to the bell and it's green.

Screenshots

Use something like licecap to capture gifs to demonstrate behaviors.

Additional Notes:

Anything else to add?

Impacted Areas in Application

@todo

Today I learned...

[ygannett]

The Backstop failures are from map renddering.