Run linter checks when ready to push (not when committing)

Running the linter checks currently takes a few seconds.
So running them every time someone wants to commit actually
adds friction to the developer experience.
Developers should feel free to commit frequently while
iterating on their local branches.
To this end, it makes sense to batch commits and defer running the
checks until the developer is ready to push.

Signed-off-by: Armel Soro <[email protected]>