Use Rancher secret key names for vSphere in secret mapper

[furkatgofurov7]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1109

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests

[thehejik]

After applying the fix the message is not visible anymore:

status:
  conditions:
    - lastTransitionTime: '2025-02-27T10:10:20Z'
      message: Updated to latest v1.12.0 version
      status: 'True'
      type: CheckLatestVersionTime
    - lastTransitionTime: '2025-02-27T10:10:20Z'
      status: 'True'
      type: LastAppliedConfigurationTime
    - lastTransitionTime: '2025-02-27T10:10:20Z'
      status: 'True'
      type: RancherCredentialsSecretMapped

Also the secret is generated properly now