Merge "doc: Fix syntax erros in I/O storage layer plantuml diagrams" into integration

docs/resources/diagrams/plantuml/io_dev_init_and_check.puml

 @startuml
 
-participant arm_io_storage order 1
-participant io_storage order 2
+participant arm_io_storage
+participant io_storage
 
  -> arm_io_storage : plat_get_image_source(image_id, &dev_handle, &image_spec)
 

docs/resources/diagrams/plantuml/io_dev_registration.puml

 @startuml
 
-participant arm_io_storage order 1
-participant io_storage order 2
-participant io_fip order 3
-participant io_memmap order 4
+participant arm_io_storage
+participant io_storage
+participant io_fip
+participant io_memmap
 
  -> arm_io_storage : arm_io_setup()
 

docs/resources/diagrams/plantuml/io_framework_usage_overview.puml

 @startuml
 
-participant bl_common order 1
-participant arm_io_storage order 2
-participant io_storage order 3
+participant bl_common
+participant arm_io_storage
+participant io_storage
 
 == Platform Setup ==