This PR adds labels to Dockerfiles. The labels are the source
(https://github.com/gem5/gem5), a description, and the license.
Change-Id: I47ce432257641b394efef4958f1474eefe2a11c1
Co-authored-by: Harshil Patel <harshilp2107@gmail.com>
1. Uses the ubuntu-24.04_all-deps as the base image.
2. Unifies the build and cleanup into a single step, thus reducing the
size of the image.
Change-Id: I63b5dad2af0e8b1f6be8ad1f28321c743f36b2dc