sagemathgh-39359: Addition of new presentations to Chow rings of matroids
    
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This PR focuses on adding the atom-free and simplicial presentation of
Chow rings of matroids. [see relevant
issue](sagemath#37987)
The former is taken from Definition 4.1 of [this
paper](https://arxiv.org/abs/2111.00393) and the latter from Definition
3.2.1 of [this paper](https://arxiv.org/pdf/1905.07114).

@tscrim

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URL: sagemath#39359
Reported by: Shriya Meenakshisundaram
Reviewer(s): Shriya Meenakshisundaram, Travis Scrimshaw