[1.7.x] Removed unnecessary code in ManyToManyField.deconstruct()

Backport of 44169a00c1fe7c130a8b9774e3b02ccce524a3eb from master.
[1.7.x] Added missing logic to TimeField.deconstruct().

If auto_now or auto_now_add was used then the serialized
field in the migration contained unnecessary `editable` and
`blank` arguments.

Backport of 74325339327e5b8a2480aee7f482bc71f73c71f9 from master.
[1.7.x] Fixed #23156 -- Added missing BinaryField.deconstruct() method.

Backport of 72f1eb48df335c110f39d56f7978d95896a56bb8 from master.