refactor: [M3-7230] - Migrate NodeBalancer Node Mode Select TextField to Autocomplete

[bnussman-akamai]

Description 📝

• Very similar PR to chore: [M3-7231] - Migrate Filesystem TextField Select to Autocomplete #9752 (Only 1 more to go after this one 😁)
• In order to fix up our TextField component, we need to not allow it to be used as a select component. This PR replaces the TextField Select in the NodeBalancer config node component with a modern alternative like Autocomplete

Major Changes 🔄

• Clean up Remove button styles
• Replace <TextField select>...</TextField> with an <Autocomplete />
• Removes some unused testing attributes

Preview 📷

Before	After

How to test 🧪

• Deploy a Linode with a private ipv4
• Go create a NodeBalancer in the same region as that Linode
• Add your Linode as a node and complete the NodeBalancer creation
• Go to that NodeBalancer's config and test the Mode Select
  • Test styles 🎨
  • Test functionality 🎮

[hana-akamai]

Looks like removing a Backend Node broke 🤔

Screen.Recording.2023-10-05.at.5.03.23.PM.mov

[bnussman-akamai]

@hana-linode Thank you! Fixed in eb9667a

[hana-akamai]

Confirmed that the Mode select still looks and works as expected and that remove still works 🎉

[jdamore-linode]

Thanks @bnussman-akamai! Confirmed that the autocomplete field works/looks as expected and that I can add/remove nodes. Also confirmed that I can actually save the config changes