bring back possibility to override camera per view

this can now be found in the sidebar View panel

- uses existing 'lock_camera_and_layers' but renames the property to
'use_local_camera'
- uses RNA_def_property_boolean_negative_sdna to flip the value
- remove the local view code in
rna_SpaceView3D_lock_camera_and_layers_set
- update Python code
- update Addons code will be separate commit

Fixes T60756

Reviewers: billreynish, brecht

Maniphest Tasks: T60756

Differential Revision: https://developer.blender.org/D4247

release/scripts/startup/bl_operators/object.py

@@ -133,7 +133,7 @@ class SelectCamera(Operator):
         scene = context.scene
         view_layer = context.view_layer
         view = context.space_data
-        if view.type == 'VIEW_3D' and not view.lock_camera_and_layers:
+        if view.type == 'VIEW_3D' and view.use_local_camera:
             camera = view.camera
         else:
             camera = scene.camera

release/scripts/startup/bl_ui/space_view3d.py

@@ -4206,7 +4206,10 @@ class VIEW3D_PT_view3d_properties(Panel):
         col = flow.column()
 
         subcol = col.column()
-        subcol.enabled = not view.lock_camera_and_layers
+        subcol.prop(view, "use_local_camera")
+
+        subcol = col.column()
+        subcol.enabled = view.use_local_camera
         subcol.prop(view, "camera", text="Local Camera")
 
         subcol = col.column(align=True)