/api/ssh/generate should validate name.

[monaka]

Describe the bug

After creating SSH keypair via API with unsuitable parameter, all workspaces can't boot up.

Che version

• nightly

Steps to reproduce

1. Open swagger.
2. Call /api/ssh/generate with paramter { "name": "Non FQDN string as you like", "service": "vcs" }
3. Boot up your workspace. It will be failed by naming issue on the K8s secret object.

Expected behavior

Unsuitable names should be rejected by /api/ssh/generate.

Runtime

• other: (please specify) Runtime independent.

Installation method

• I don't know Installation independent

Environment

• other: please specify Environment independent.

Additional context

Related on #14243.

[monaka]

I think this will be showstopper if the user set it. But it will be a rare case. So it isn't urgent (enough to be fixed after 7.0.0 released).

[gorkem]

@monaka is this also related to #14218

[monaka]

@gorkem Yes. I close this and move to #14218.