Allow to set protected file patterns that can not be changed under no conditions (#10806)

Co-Authored-By: zeripath <art27@cantab.net>

modules/convert/convert.go

@@ -120,6 +120,7 @@ func ToBranchProtection(bp *models.ProtectedBranch) *api.BranchProtection {
 		BlockOnRejectedReviews:      bp.BlockOnRejectedReviews,
 		DismissStaleApprovals:       bp.DismissStaleApprovals,
 		RequireSignedCommits:        bp.RequireSignedCommits,
+		ProtectedFilePatterns:       bp.ProtectedFilePatterns,
 		Created:                     bp.CreatedUnix.AsTime(),
 		Updated:                     bp.UpdatedUnix.AsTime(),
 	}