[JENKINS-73831] Replace some logos by svg symbols

[jonesbusy]

More details/option on JENKINS-73831

Replace 2 old png by monochrome/themable symbol

Testing done

Before

Default theme

Dark theme

After

Default theme

Dark theme

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[jonesbusy]

(If accepted can you add the hacktoberfest-accepted label on this PR)

Thanks!