Network Manager improvements

[schaable]

Here's a list of potential improvements for the network-manager plugin, broken down into key areas for clarity. Request modifiers aren’t covered in this issue.

Types

• Align types with Hardhat v2 for easier migration. HttpNetwork types seem fine, but EDRNetwork types should be double-checked.

PR: #6031

Config Validation

• Make sure all z schemas match their defined types.
• As part of the refactor of the configOverrides in the NetworkManager.connect() method, we should remove all the user schemas.
• Some logic could be extracted for reutilization.
• Use sensitiveUrlSchema when needed (covered in Type Mismatch in Network Fields Using configVariable #5907).

Config Resolution

• Resolve Genesys accounts correctly.
• Validate EDR config (covered in Improve EDR config resolution #5961):
  • Match defaults with v2.
  • Use constants for things like hardfork.
  • Check config names like forkConfig.

PR: #6031

EDR Provider

• Add tests.
• Initialize the EDR context in the NetworkManager class and add a hook to allow plugins to register new factories.
• Move config-related initialization to the config resolution. Done in PR: Network Config types cleanup and Edr Network config resolution #6031
• Address how "l1" is passed to EDR (currently limited to "generic" or "optimism").
• Clean up:
  • Error handing.
  • Refactor send and sendAsync to avoid duplication.
• Clear values on close() to avoid memory leaks (covered in EDR garbage collection in multi-chain cases #5962).
• Cleanup stack traces leftover code (see Solidity stack traces aren't displayed in v3 #5980).

Http Provider

• Don’t expose Undici.Dispatcher, even in tests. Maybe we could create a custom type for the dispatcher.
• Emit Hardhat network events.
• Cleanup the overloads in fetchJsonRpcResponse.

NetworkManager Implementation

• Fix: reassigning this.#hookManager shouldn’t be necessary.
• Reevaluate how networkConfigOverride works in the connect function.

General Cleanup

• Rename networkConfig.type to networkConfig.connectionType and use constants for values.
• Use constants for the chainType values.
• Update readonly properties in network and provider classes to use Readonly<T>.
• Improve typing for getRequestParams (currently returns any[]).
• There are some utilities in network-manager/rpc that are used by the request-modifiers. We should analyze if it's worth moving any of this to hardhat-utils.
• Decide if anything needs to be done for the console logger.
• Address comments in utils/convert-to-edr.