mc support commands: allow --json in online mode

[anjalshireesh]

Community Contribution License

All community contributions in this pull request are licensed to the project maintainers under the terms of the Apache 2 license. By creating this pull request I represent that I have the right to license the contributions to the project maintainers under the Apache 2 license.

Description

There was a validation that said --json is supported only when --airgap is also passed for SUBNET related mc support commands.

Remove this validation to allow --json to be passed even in online mode. In this scenario, print a status JSON after upload to SUBNET.

While at it,

• mc support profile currently doesn't support --json properly. fix it.
• Remove --api-key flat from mc support proxy commands as they don't need to talk to SUBNET.

Motivation and Context

Ensure --json is supported in all scenarios

How to test this PR?

• Test mc support diag|perf|profile|inspect
  • verify that all of them support --json irrespective of whether --airgap is passed

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Optimization (provides speedup with no functional changes)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] Fixes a regression (If yes, please add commit-id or PR # here)
• [ ] Unit tests added/updated
• [ ] Internal documentation updated
• [ ] Create a documentation update request here