Remove "block" class from `~/javascripts/jobs/components/artifacts_block.vue`

Description

~/javascripts/jobs/components/artifacts_block.vue has a refrence to block to should be replaced with gl-display-block, however, that class is referred by some CSS upstream to apply styles.

Proposed solution

Remove the block class and replace all applied styles with utility classes where possible.

Original MR

The following discussion from !52526 (merged) should be addressed:

• @pburdette started a discussion: (+4 comments)

  Fun fact: I wanted to use gl-display-block here but we have some CSS upstream that looks for this block class to apply styles 🤦