Drop Resty as a dependency

[ezilber-akamai]

📝 Description

Linodego currently uses the go-resty package to manage all HTTP requests made to the API. This includes logic for authentication, JSON marshaling/unmarshaling, request retries, and debug outputs.

Unfortunately this package has caused various issues for linodego users, including:

• Various upstream race conditions prevent linodego from being thread-safe
• Uncommitted maintainers lead to difficulty quickly releasing patches for critical issues
• Bloated dependency tree can cause downstream dependency conflicts
• Less flexibility due to limited access to the underlying HTTP client

Because of these issues, Resty is being dropped as a dependency in favor of the mature and widely adopted net/http package.

✔️ How to Test

TBD