Rename our own typeclasses to follow new naming scheme

theories/lang/adequacy.v

theories/lang/lib/arc.v

theories/lang/lib/lock.v

theories/lang/lib/memcpy.v

theories/lang/lib/new_delete.v

theories/lang/lib/spawn.v

theories/lang/lib/swap.v

theories/lang/lib/tests.v

theories/lang/lifting.v

theories/lang/proofmode.v

theories/lifetime/at_borrow.v

theories/lifetime/frac_borrow.v

theories/lifetime/lifetime.v

theories/lifetime/lifetime_sig.v

theories/lifetime/meta.v

theories/lifetime/model/accessors.v

theories/lifetime/model/borrow.v

theories/lifetime/model/borrow_sep.v

theories/lifetime/model/creation.v

theories/lifetime/model/definitions.v