This updates ContainerClient to use upload-oriented naming for container file writes, aligning the API with DownloadContainerFile and the rest of the library’s file semantics. The change is limited to the container file upload surface and its generated/public API projections.

• API surface

  • Renames CreateContainerFile → UploadContainerFile
  • Renames CreateContainerFileAsync → UploadContainerFileAsync
  • Applies the rename through the container client TypeSpec customization so generated and public API surfaces stay consistent

• Generated client updates

  • Regenerates ContainerClient and its REST request factory to use the new method names
  • Updates exported API baselines for all target frameworks

• Tests and docs

  • Updates container tests to call the renamed methods

• Example

  var formData = new MultiPartFormDataBinaryContent();
  formData.Add(contentBytes, "file", "example.txt", "text/plain");
  
  ClientResult result =
      await client.UploadContainerFileAsync(containerId, formData, formData.ContentType);