Clean up the code when checking z/OSMF [v3]

[Martin-Zeithaml]

Please check if your PR fulfills the following requirements. This is simply a reminder of what we are going to look for before merging your PR. If you don't know all of this information when you create this PR, don't worry. You can edit this template as you're working on it.

• DCO signoffs have been added to all commits, including this PR

PR type

What type of changes does your PR introduce to Zowe? Put an x in the box that applies to this PR. If you're unsure about any of them, don't hesitate to ask.

• Feature

Relevant issues

Fixes #3932

Changes proposed in this PR

When checking z/OSMF connection, some messages might be confusing. See testing.

Does this PR introduce a breaking change?

• No

Testing

Always this setting:

zowe:
  environments:
    ZOSMF_HOST: example.com
    ZOSMF_PORT: 1234

With or without fix, if discovery.enabled=true:
Successfully checked z/OS MF is available on 'https://example.com:1234/zosmf/info'

But when this is set:

components.discovery.enabled=false
components.zaas.apiml.security.auth.provider=zosmf

No fix, confusing error message is printed and the zowe continues:
ERROR: z/OSMF is not configured. Using z/OSMF as authentication provider is not supported.

With fix, error with reason is printed and zowe is terminated:

ERROR: Using z/OSMF as 'components.zaas.apiml.security.auth.provider' is not possible: discovery is disabled.
ERROR: 2024-08-28 09:38:37 <ZWELS:33950026> martin ERROR (zwe-internal-start-prepare,global_validate) Zosmf validation failed

[github-actions]

build 5810 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592786597

[github-actions]

build 5811 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592807140

[github-actions]

build 5813 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592836004

[github-actions]

build 5814 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592847929

[github-actions]

Test workflow 5221 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3956/zowe-3.0.0-pr-3956-5810-20240828081719.pax
Running on machine: zzow08
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592881447

[github-actions]

Test workflow 5222 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3956/zowe-3.0.0-pr-3956-5811-20240828082252.pax
Running on machine: zzow06
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592966828

[github-actions]

Test workflow 5223 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3956/zowe-3.0.0-pr-3956-5813-20240828082334.pax
Running on machine: zzow06
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10592978506

[github-actions]

Test workflow 5224 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3956/zowe-3.0.0-pr-3956-5814-20240828082550.pax
Running on machine: zzow08
Result: SUCCESS
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10593015603

[MarkAckert]

Should we port this to v2 as well?

[Martin-Zeithaml]

Should we port this to v2 as well?

I called this an enhancement so we don't have to do it for v2 😄
But it should be ported to v2 as well.

[github-actions]

build 5950 SUCCEEDED.
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10739996113

[github-actions]

Test workflow 5320 is started.
Running install test: Convenience Pax
The zowe artifact being used by this test workflow: libs-snapshot-local/org/zowe/3.0.0-PR-3956/zowe-3.0.0-pr-3956-5950-20240906142405.pax
Running on machine: zzow08
Result: FAILURE
Link to workflow run: https://github.com/zowe/zowe-install-packaging/actions/runs/10740107002