modernize super in manifolds/

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using the short syntax `super()`

CC:  @egourgoulhon

Component: **manifolds**

Author: **Frédéric Chapoton**

Branch/Commit: **[`9944678`](https://github.com/sagemath/sagetrac-mirror/commit/99446784265889212b137e55e7a6d1adc3e82d3e)**

Reviewer: **Kwankyu Lee, Eric Gourgoulhon**

_Issue created by migration from https://trac.sagemath.org/ticket/34532_

