[DAC] Introduce `V1` API

Part off #5437 (closed) ([DAC]: Version API)

Introduce V1 API that would initially be the exact copy of V0 API.

Currently we have only released experimental (but binding) V0 DAC API, which will be used by the 1M/tps and supports all existing endpoints (including the ones specific to the legacy mode). We want to first release the exact copy of V0 API so that we can start with iterative work towards releasing V1 API.

Note: there has already been a similar attempt at releasing v1 API together with experimental v0 API where the two are the same !8554 (closed). However, adding support for the two APIs at the same have been proven quite cumbersome. As a result many follow-up issues/questions have been opened that we will try to track independently.