[Quick Add Bulk] Don't block quantity input during cart API call

[sofiamatulis]

PR Summary:

Before (user blocked until the current call being made is done):

After:

Why are these changes introduced?

Fixes #3417 https://github.com/orgs/Shopify/projects/6397/views/28?pane=issue&itemId=59790024

What approach did you take?

I am reusing the functionality from the QOL to create a queue of calls. I am also doing some refactoring to re-use some of the functions in both quick-order-list.js and quick-add-bulk.js

Other considerations

I have not pulled out updateMultipleQty and renderSections since there are some differences there. I think it will make it a bit more difficult for readability

Testing steps/scenarios

• [ ] Test changing the amount in the quick add bulk live picker with +/- quickly
• [ ] Test changing the amount in the quick add bulk live picker with the input quickly
• [ ] Ensure the changes in QOL still work (refactoring happened)

Demo links

• Editor

Checklist

• [ ] Added PR summary for release notes
• [ ] Requested review from UX (Only for changes that are affecting the experience or perceivable visual details)
• [ ] Created a ticket for the help.shopify.com documentation team about updates to theme settings. (Internal-only task)
• [ ] Followed theme code principles
• [ ] Linted with Theme Check
• [ ] Tested on mobile
• [ ] Tested on multiple browsers
• [ ] Tested for accessibility

[dan-menard]

I can't seem to reproduce this anymore 😅 I must've been previewing the live store and getting the existing behaviour.

~I noticed when I time my clicks so I only click when the loading bar is active, it will sometimes decrease the number instead of increasing it:~

https://github.com/Shopify/dawn/assets/590055/31fdcae8-d1b6-418d-869b-a43ffd850159