Style changes to devops tools

Step 1: What is changing in this MR?

Make table styles on /devops-tools match /competition

Production	Review App
https://about.gitlab.com/devops-tools/	https://1850-eng-devops-tools-table-ui-updates.about.gitlab-review.app/devops-tools/

Step 2: Ensure that your changes comply with the following, where applicable:

• I, the Assignee, have run Axe tools on any updated pages, and fixed the relevant accessibility issues.
• These changes meet a specific OKR or item in our Quarterly Plan.
• These changes work on both Safari, Chrome, and Firefox.
• These changes have been reviewed for Visual Quality Assurance and Functional Quality Assurance on Mobile, Desktop, and Tablet.
• These changes work with our Google Analytics and SEO tools.
• These changes have been documented as expected.

Closes #1850 (closed)