[WIP] Standard Hwloc Configs

[amroakmal]

Resolves #809

[michaelmckinsey1]

Can we refactor

class HwlocVariantValues(str, Enum):
    NONE = "none"
    ON = "on"

into

    variant(
        "hwloc",
        default=HwlocVariantValues.NONE.value,
        values=tuple(v.value for v in HwlocVariantValues),
        multi=False,
        description="Get underlying infrastructure topology",
    )

so it is the similar to the Affinity and SingleNode classes? I did not catch this in the last PR, but for consistency I think they should work the same.

[amroakmal]

@michaelmckinsey1 : Yes, sure. I thought this is cleaner and safer honestly, and more maintainable, so to not miss any value by a typo. Do you think better to stick old behavior? Or better adopt the Enum to other modifiers so all be on consistent and safer to deal with?

Thanks so much for bringing this up.

[amroakmal]

Self reminder: Improve variable names of the HWLOC class in experiment.py