Update CI workflow to free up disk space before building docker image

[AdeelH]

Overview

This PR attempts to fix no space left on device errors while building the docker image in the CI:

Supersedes #1872.

Checklist

• Added needs-backport label if PR is bug fix that applies to previous minor release
• Ran scripts/format_code and committed any changes
• Documentation updated if needed
• PR has a name that won't get you publicly shamed for vagueness

Notes

N/A

Testing Instructions

N/A

[codecov]

Codecov Report

Merging #1953 (d2a3759) into master (138a4bf) will not change coverage.
Report is 2 commits behind head on master.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1953   +/-   ##
=======================================
  Coverage   82.46%   82.46%           
=======================================
  Files         190      190           
  Lines        9336     9336           
=======================================
  Hits         7699     7699           
  Misses       1637     1637