Use rdkit for SSSR and RCs (bug fix + Python upgrade)

[JacksonBurns]

Currently we use RingDecomposerLib for finding the Smallest Set of Smallest Rings and getting the Relevant Cycles. This package does not support Python 3.10+ and is thus blocking further upgrades to RMG.

@KnathanM in particular is looking to get RMG to Python 3.11 so as to add support for ChemProp v2.

I believe we can just use RDKit to do these operations instead. The original paper mentions that the functionality was being moved upstream to RDKit. With the help of AI I've taken just a first pass at reimplementing, with the special note that:

• I opted to use the Symmetric SSSR in place of the 'true' SSSR. This is because the latter is non-unique (see RDKit's "The SSSR Problem"). This should actually resolve get_deterministic_sssr is not really deterministic #2562
• I need to read more about the "Relevant Cycles"

This PR will be a draft for now, as it is predicated on Python 3.9 already being available (which it nearly is in #2741)

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[JacksonBurns]

Cantera 2.6 isn't available for Python 3.12, so this PR will also need to upgrade the Cantera version to 3 as mostly completed in #2751

[JacksonBurns]

A note for the path forward on this PR - the get_relevant_cycles and get_smallest_set_of_smallest_rings functions will need to be moved to Molecule. Currently they are in Graph, and Graph has no way to send itself to RDKit in order to be subject to RDKit GetSymmSSSR but Molecule can be converted to RDKit via converted.to_rdkit_mol (also exposed as Molecule.to_rdkit_mol, and then RDKit can be used. This may have implications for inheritance elsewhere in the codebase, but should be OK.