Add 2026-04-01-preview API version to Fleet#42457

diyellap merged 13 commits intomainAzure/azure-rest-api-specs:mainfrom

diyellap-azurefleet-Microsoft.AzureFleet-2026-04-01-previewAzure/azure-rest-api-specs:diyellap-azurefleet-Microsoft.AzureFleet-2026-04-01-previewCopy head branch name to clipboard