AK: Split Sponsorship by Chamber

[NewAgeAirbender]

In AK, we already have a check that SENATORS|REPRESENTATIVE exist on a paragraph of Sponsors (ex HB 3), & we'd like to update the add_sponsorships on line 107 & 121 include the correct chamber like in ME, upper for the list of Senators & lower for Representatives. As with the example bill, sometimes there can be both sponsors from both chambers so it may need to switch which chamber is being added as the sponsors are parsed.

[braykuka]

@NewAgeAirbender I will check it.

[austinhouck]

@NewAgeAirbender @jessemortenson this can probably be closed