Updates to the swap-amounts component

• Checks if the page has a NSG for onetime and monthly frequencies
• Adds config overrideNSG to be set for each frequency
• If one-time NSG is available, do not swap list for one-time amounts unless config.onetime.overrideNSG is true
• If monthly NSG is available, do not swap list for monthly amounts unless config.monthly.overrideNSG is true
• Swapping between a NSG list and a EngridAmounts list retains their respective values (ie. if NSG has values for onetime, it will use those values when swapping back from monthly to onetime)

Allows for swap-amounts to still function on monthly for swapping if NSG only suggests amounts for one-time, or vice-versa. Previously, if NSG was detected at all, swap-amounts would not run.

Test pages

NSG for monthly and one-time flow: https://act.amnestyusa.org/page/193997/data/1?mode=DEMO
NSG for one-time only flow: https://act.amnestyusa.org/page/194210/data/1?mode=DEMO

Edit page for monthly and one-time: https://ca.engagingnetworks.app/index.html#pages/194211/edit
Edit page for one-time only: https://ca.engagingnetworks.app/index.html#pages/194211/edit

One-time only flow:

1. Enter the email of a supporter that has a NSG staged (omitted from this publicly viewable PR)
2. Submit the form, donation page opens with data autofilled
3. Swapping from One-Time to Monthly should display the amounts set in window.EngridAmounts.monthly.amounts
4. Swapping back to One-Time should display the amounts set in window.EngagingNetworks.suggestedGift.single and have the sticky-default of the entry with nextSuggestedGift = true

Monthly and one-time flow:

1. Enter the email of a supporter that has a NSG staged (omitted from this publicly viewable PR)
2. Submit the form, donation page opens with data autofilled
3. Swapping from One-Time to Monthly should display the amounts set in window.EngagingNetworks.suggestedGift.recurring and have the sticky-default of the entry with nextSuggestedGift = true
4. Swapping back to One-Time should display the amounts set in window.EngagingNetworks.suggestedGift.single and have the sticky-default of the entry with nextSuggestedGift = true

Update "Amount Swap" codeblock for both edit page links (client: AIUSA)

1. In the "onetime" config area, set overrideNSG: true
2. Re-test one time and monthy and one-time flows, noting that the one-time amounts are those set in the EngridAmounts config, and not the NSG values.