prototype of template-based yamls as an alternative to basic example

[1000TurquoisePogs]

• Tests for the changes have been added (for bug fixes / features)
• Necessary documentation (if appropriate) have been added / updated
• DCO signoffs have been added to all commits, including this PR

PR type

• Feature

Relevant issues

Resolves zowe/community#1884
Evolution of #3356

Changes proposed in this PR

This PR introduces a new way to setup zowe.
Instead of just getting example-zowe.yaml and editing it, there are 2 files:

• A defaults.yaml file, never to be edited, but to be used in a yaml list
• A templated example yaml file. To be edited, but with templates to reduce configuration steps.

The defaults.yaml, though more work due to needing to use the advanced CONFIG=FILE(/path/to/my-config.yaml):FILE(/path/to/default.yaml) syntax, gives advantage of users not needing to take action upon upgrades to zowe: default.yaml will change at our discretion to give the user a smooth upgrade experience.

The idea is, the user finds whichever template yaml that best suits their keystore need, and then edits that, which should require less edits overall due to templates.

These yamls now also have new comments which are hopefully more helpful than before.

Does this PR introduce a breaking change?

• No

[github-actions]

PAX build 3550 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/5649355544

[github-actions]

Test workflow 3059 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/2.10.0-PR-3523/zowe-2.10.0-pr-3523-3550-20230724201821.pax
Running on machine: zzow04
Result: FAILURE
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/5649428723

[Joe-Winchester]

This looks great ! I'm not that famliar with the imported keyring scenarios, but the pkcs12 and keyring generated and imported look really nice.

[github-actions]

PAX build 3847 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/6484349188

[github-actions]

Test workflow 3339 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/2.12.0-PR-3523/zowe-2.12.0-pr-3523-3847-20231011150703.pax
Running on machine: zzow04
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/6484456834

[github-actions]

PAX build 4537 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/7906039306

[github-actions]

Test workflow 3967 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/2.15.0-PR-3523/zowe-2.15.0-pr-3523-4537-20240214190651.pax
Running on machine: zzow08
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/7906151636

[1000TurquoisePogs]

Closed for now due to defaults.yaml used elsewhere. Will revisit defaults.yaml enhancements over time.