ci: add AppCo e2e test pipeline

[chriscchien]

Which issue(s) this PR fixes:

add AppCo e2e test pipeline

test result on 1.10.x e2e regression : https://10.115.5.5/job/private/job/longhorn-appco-e2e-test/19/

What this PR does / why we need it:

Special notes for your reviewer:

Additional documentation or context

[mergify[bot]]

This pull request is now in conflict. Could you fix it @chriscchien? 🙏

[chriscchien]

The conflict resolved.

[yangchiu]

The conflict resolved.

According to https://github.com/longhorn/longhorn-tests/pull/2924/conflicts. It still conflicts.

[chriscchien]

The conflict resolved.

According to https://github.com/longhorn/longhorn-tests/pull/2924/conflicts. It still conflicts.

Updated

• Use one Jenkins file
• Move inject_appco_env_vars to appco_env.sh

Non air gap install test result

• Test Uninstall When Backing Image Exists
• -k test_volume_basic
• pytest upgrade test

Air gap installation test result

• Test Uninstall When Backing Image Exists
• -k test_volume_basic
• pytest 2 stage upgrade test