[Sites] Change "login bar" styles

• Type: Technical Task
• Status: Closed
• Priority: Major
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: None
• Labels: None
• Sprint: S01E08 - Nightmare before Xmas, S01E11 - Airplane!, S01E12 - Alien
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/57126

We need to change the "login bar" styles in “sites”

From this (as it is right now in portal):

To this:

Styles description:
height: 64px
background color: white
border bottom: 1px solid #E7E7ED
user name link color: #6B6C7E
space between the search input and the sticker: 24px
space between sticker and user name: 8px
The search input styles are the default Clay styles