HUE-2026 [core] Create a doc model write permission

Add permission 'modify'.
Implicit read permission with 'modify'.
Modify pig and oozie apps to use 'can_modify' when
allowing other users to write.
HUE-2026 [core] Create a doc model write permission

Improved sharing modal UX
HUE-2026 [core] Create a doc model write permission

change modify to write