deprecate some is_*** functions

<div id="comment:0"></div>

namely

```
is_field
is_commutative
is_integrally_closed
```

CC:  @tscrim @slel

Component: **refactoring**

Author: **Frédéric Chapoton**

Branch/Commit: **[`32f9927`](https://github.com/sagemath/sagetrac-mirror/commit/32f99275338f717e14e3fe039995f41f2be8a528)**

Reviewer: **Travis Scrimshaw**

_Issue created by migration from https://trac.sagemath.org/ticket/32347_

