checkTypeEquivalence now considers ProbeInfo (backport #4064) (#4112)

* checkTypeEquivalence now considers ProbeInfo (#4064)

* type equivalence includes probe
* Add type equivalence checks for Probes, including writeability and color.

(cherry picked from commit 62f8a05e

)

* Remove notion of probe color which is a Chisel 7 feature

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Co-authored-by: Megan Wachs <megan@sifive.com>
Co-authored-by: Jack Koenig <koenig@sifive.com>