Alert: alert-secondary and new prop for icon

[marcoscv-work]

New alert secondary and new prop for icon

The original proposal is comming from Echo DXP team and after a Lexicon reviwed it make sense and we can go ahead with it:

Request: https://issues.liferay.com/browse/DESIGN-4816 Design: https://www.figma.com/file/nVGg94HV43eQVkjsEl6bft/LPS-167668---New-pattern-for-fragments-mapped-to-entities-the-user-does-not-have-permissions-on?node-id=26%3A131059

Clay suggested next steps:

• Using alert-secondary as base (avoiding creating new variations)
• Remplacing seconday alert colors (just a small adjustments in variables)
• Providing a way (new prop) to select the exactly icon from the spritemap (for this example, permissions icon)

New colors (from figma):

Add color in: css/src/scss/variables/_alerts.scss

[github-actions[bot]]

This issue has been merged and will be released in DXP at https://issues.liferay.com/browse/LPS-173187