[tracking] migration of early adopters to custom plans

[heyjay44]

We need to implement custom plans so that users with needs beyond the tiers can access web3.storage services.

Workflow

• [x] https://github.com/web3-storage/web3.storage/issues/2127
• [x] https://github.com/web3-storage/web3.storage/issues/2128
• [x] https://github.com/web3-storage/web3.storage/issues/2119
• [x] https://github.com/web3-storage/web3.storage/issues/2129

Find requirements/discussion here

needs #2133