CI: Add additional log group to setup_ubuntu script

[RytoEX]

Description

Add clear separation between the CEF setup and the apt/apt-get calls. This makes it easier to see how much time is being spent on each task.

Motivation and Context

Was comparing build times between the ubuntu-22.04 and ubuntu-24.04 runners, and it bothered me that the "CEF" step included the calls to apt-get.

How Has This Been Tested?

It hasn't, but it's a single line logging addition.

Types of changes

• Tweak (non-breaking change to improve existing functionality)

• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.