[Security Solution][EUI visual refresh] change usages of success to accentSecondary

[PhilippeOberti]

Context

Changes are made to EUI that will be visible to end-users in Kibana:

• Updated all colors in EUI
• Reduce the topmost font weights and sizes (think titles and headings)
  These changes are available in a new theme called Borealis.

See parent ticket for how to use the new theme and labels to add to the PR for tracking

Important

Make sure that you use the backport:skip label on the PR!!

Description

All usages of "success" colors have been updated to "accentSecondary" and "textAccentSecondary" as needed.

Important

Success is changing from teal to a semantic green. We are asking all teams to now only use success to convey affirmative, semantic meaning. If you were using it as a means of displaying a teal brand color, you can continue doing so with the accentSecondary color.
Please look at each instance where you are using the "success" color.

• If conveying some affirmative meaning - success, a positive action, etc. -- continue using the success color
• If not -- please update the color to accentSecondary

If you are unsure, ask your assigned "Design QA" team member or the EUI Team

# previous color token -> new color token
success -> success // Semantic green conveys an affirmative meaning
success ->  accentSecondary // Teal green for non-semantic purposes; aligns to brand

An example of an affirmative meaning would be this confirmation dialog. This would use the success color:

An example of a non-affirmative meaning would be the background of the "Security" badge. This would use the accentSeoncary color.

[elasticmachine]

Pinging @elastic/security-threat-hunting (Team:Threat Hunting)

[elasticmachine]

Pinging @elastic/security-solution (Team: SecuritySolution)

[elasticmachine]

Pinging @elastic/security-threat-hunting-investigations (Team:Threat Hunting:Investigations)

[lgestc]

my changes were deemed unnecessary as the current use of success seems fine (per design team)