use validator manager v2_0_0 as default

[felipemadero]

Why this should be merged

Closes #2629 #2640

Main difference with CLI 1.0.0 implementation:

• On 1.0.0 there is only one validator manager, one proxy, one proxy admin, both for PoS and PoA cases. For PoA, the proxy, proxy admin, and manager are all set in genesis. For PoS, the proxy, proxy admin, validator messages lib and reward calculator are set in genesis, while the manager is deployed afterwards.
• On 2.0.0, there is only one validator manager, one proxy and one proxy admin for PoA, but two proxies, two proxy admins, a validator manager, and a specialized validator manager for PoS. For PoA, the proxy, proxy admin, and manager are all set in genesis. For PoS, the two proxies, the two proxy admins, the validator messages lib and reward calculator are set in genesis, while the manager and the specialized managers are deployed afterwards. So, not always a manager is having a fixed address. But the proxies have.

Validator Manager Proxy Address: 0x0FEEDC0DE0000000000000000000000000000000 (PoA)
Specialized Manager Proxy Address: 0x100C0DE1C0FFEE00000000000000000000000000 (PoS)

For PoS, a Validator Manager Proxy Address is also present at the FEEDCODE address, but is not expected to be
typically accessed by the user.

How this works

How this was tested

How is this documented

[Tonix517]

approved to unblock merging - assuming all tests pass