Split appliance build jobs and run in parallel

[bdunne]

• remove iso_modify logic, it's overwritten by oz
• Dynamically set storage directory allowing multiple runners to run in parallel Add option to upload only (don't build)
• Switch to building individual images and uploading at the end

[miq-bot]

Checked commit https://github.com/bdunne/manageiq-appliance-build/commit/810aa6fcc1111748f993fe24fe2d10fe84e40bd7 with ruby 2.6.10, rubocop 1.28.2, haml-lint 0.35.0, and yamllint 3 files checked, 5 offenses detected

.github/workflows/build_appliances.yaml

• [ ] :warning: - Line 40, Col 121 - 224 > 120 characters) (line-length - line too long

scripts/uploader.rb

• [ ] :exclamation: - Line 64, Col 25 - Style/FetchEnvVar - Use ENV.fetch("S3_ACCESS_KEY") or ENV.fetch("S3_ACCESS_KEY", nil) instead of ENV["S3_ACCESS_KEY"].
• [ ] :exclamation: - Line 65, Col 25 - Style/FetchEnvVar - Use ENV.fetch("S3_SECRET_KEY") or ENV.fetch("S3_SECRET_KEY", nil) instead of ENV["S3_SECRET_KEY"].
• [ ] :exclamation: - Line 66, Col 25 - Style/FetchEnvVar - Use ENV.fetch("S3_ENDPOINT") or ENV.fetch("S3_ENDPOINT", nil) instead of ENV["S3_ENDPOINT"].

scripts/vmbuild.rb

• [ ] :exclamation: - Line 31, Col 74 - Style/FetchEnvVar - Use ENV.fetch('GITHUB_RUN_ID') or ENV.fetch('GITHUB_RUN_ID', nil) instead of ENV['GITHUB_RUN_ID'].

[Fryguy]

Backported to petrosian in commit 13e4e5262bd0205b855731b6d282fbbb01860ce2.

commit 13e4e5262bd0205b855731b6d282fbbb01860ce2
Author: Jason Frey <fryguy9@gmail.com>
Date:   Wed Jun 21 14:14:22 2023 -0400

    Merge pull request #551 from bdunne/actions_appliance_build

    Split appliance build jobs and run in parallel

    (cherry picked from commit deefbd9727f2fe4ef976bae69f93fea52f2c94eb)