[12.x] Refactor: Clean up unused $config parameters in ConcurrencyManager

[alizadeh7091]

This PR removes the unused $config parameters from the createProcessDriver, createForkDriver, and createSyncDriver methods in the ConcurrencyManager class.

These parameters were never used in the method bodies.

Removing them makes the code cleaner and easier to read.

No functionality or backward compatibility is affected because these methods are internal to the ConcurrencyManager.

Before:

public function createProcessDriver(array $config) { ... }

After:

public function createProcessDriver() { ... }

Note:
If future configuration options are added for these drivers, parameters can be reintroduced at that time.