Start modernizing Okta provider with Go SDK v5

[brennoo]

This PR modernizes the Okta provider by introducing the Okta Go SDK v5 while maintaining backward compatibility with the existing v2 SDK.

The following generators have been updated to use the v5 SDK:

• user
• app_oauth
• app_swa
• network_zone
• app_signon_policy
• app_signon_policy_rule

New resources added:

• authenticator

Related to #1936

The code has been simplified by removing unnecessary type assertions and manual filtering, and the accuracy of the generated Terraform resources has been improved.

Further modernization of the remaining resources and the introduction of missing resources will be addressed in future PRs.

[jgalluzzi]

Can the okta terraform provider be upgraded as well?

[brennoo]

Can the okta terraform provider be upgraded as well?

it should not be needed as the wrapper gets the version dynamically - I will double check

[brennoo]

yep it gets from your local, for example add this into a provider.tf

provider "okta" {}

terraform {
	required_providers {
		okta = {
                 source = "okta/okta"
	         version = "~> 4.11.1"
		}
  }
}

run terraform init then run your terraformer command to check

[brennoo]

@sergeylanzman I'm waiting on your review to decide if I continue with this effort :)