Update default revenue share for partner fees

[fhenneke]

According to https://snapshot.box/#/s:cow.eth/proposal/0xbafee087f3a1d5757e44a72fa76e8624ce212623153816a936a8888741485ef5 we need to update the default share for partners.

The implementation should probably switch to something like a dict with a default value and other values set explicitly.

The current implementation only uses two values and only has an exception for one partner address:

solver-rewards/src/config.py

Lines 111 to 113 in 58fdf14

	partner_fee_cut: float
	partner_fee_reduced_cut: float
	reduced_cut_address: str

[pierceroberts]

Hey @fhenneke !
Going of the docstrings:

    partner_fee_cut -- fraction of partner fees withheld from integration partners
    partner_fee_reduced_cut -- reduced amount withheld from partner specified as reduced_cut_address
    reduced_cut_address -- partner fee recipient who pays the reduced cut partner_fee_reduced_cut

Do do you want:

partner_fee_cut: float = 0
partner_fee_reduced_cut: float = 0
reduced_cut_address: Dict[str, str] = {}

Or are you looking to add these fields into dictionary with the keys being the reduced_cut_address and values bign the partner_reduced cuts?
Like so:

partner_fee_cut: float = 0
reduced_cut_address: Dict[str, float] = {} # where str is the address and the float is the partner_fee_reduced_cut

Could you please add more context here?
Thank you!