target/oci: OCITargetOptions.FileName -> OCITargetOptions.Filename

The `Filename` is defined in each and every target options. Modify its
name in the OCI target to be consistent with all other targets.

cmd/osbuild-worker/jobimpl-osbuild.go

@@ -716,7 +716,7 @@ func (impl *OSBuildJobImpl) Run(job worker.Job) error {
 			}
 			logWithId.Info("[OCI] 🔑 Logged in OCI")
 			logWithId.Info("[OCI] ⬆ Uploading the image")
-			file, err := os.Open(path.Join(outputDirectory, exportPath, options.FileName))
+			file, err := os.Open(path.Join(outputDirectory, exportPath, options.Filename))
 			if err != nil {
 				targetResult.TargetError = clienterrors.WorkerClientError(clienterrors.ErrorInvalidConfig, err.Error())
 				break

internal/target/oci_target.go

@@ -6,7 +6,7 @@ type OCITargetOptions struct {
 	User        string `json:"user"`
 	Tenancy     string `json:"tenancy"`
 	Region      string `json:"region"`
-	FileName    string `json:"filename"`
+	Filename    string `json:"filename"`
 	Fingerprint string `json:"fingerprint"`
 	PrivateKey  string `json:"private_key"`
 	Bucket      string `json:"bucket"`

internal/weldr/upload.go

@@ -326,7 +326,7 @@ func uploadRequestToTarget(u uploadRequest, imageType distro.ImageType) *target.
 			User:        options.User,
 			Tenancy:     options.Tenancy,
 			Region:      options.Region,
-			FileName:    imageType.Filename(),
+			Filename:    imageType.Filename(),
 			PrivateKey:  options.PrivateKey,
 			Fingerprint: options.Fingerprint,
 			Bucket:      options.Bucket,