CLOUDP-97432: live migration validation job status command

[colm-quinn]

Proposed changes

Support for "Return Status of One Specific Validation Job" Docs

Jira ticket: CLOUDP-97428

Checklist

• I have signed the MongoDB CLA
• I have added tests that prove my fix is effective or that my feature works
• I have added any necessary documentation (if appropriate)
• I have updated e2e/E2E-TESTS.md (if a new command or e2e test has been added)
• I have run make fmt and formatted my code

Command Help:

bin/mongocli atlas lm validation describe --help --profile=atlas-dev                  
Your API Key must have the Organization Owner role to successfully run this command.

Usage:
  mongocli atlas liveMigrations validation describe [flags]

Aliases:
  describe, get

Flags:
  -h, --help                  help for describe
  -o, --output string         Output format.
                              Valid values: json|json-path|go-template|go-template-file
      --projectId string      Project ID to use. Overrides configuration file or environment variable settings.
      --validationId string   Unique 24-hexadecimal digit string that identifies the validation job.

Command output:

bin/mongocli atlas lm validation describe --validationId=6141c02eadd36135e7414ac3 -o=json --profile=atlas-dev
{
  "_id": "6141c02eadd36135e7414ac3",
  "groupId": "6137493677e94f0e973d1a0f",
  "status": "PENDING",
  "sourceGroupId": "611e68cb086adf5cda2e6253"
}

[colm-quinn]

[flyby] Allowing json output for the live migration commands

[fmenezes]

Overall looks good, just blocking on one comment

[fmenezes]

code looks good