Update enable epochs flags

[ssd04]

Reasoning behind the pull request

• Added missing enable epoch flags on api endpoint

Testing procedure

• Check that /network/enable-epochs returns all enable epoch falgs from enableEpochs.toml config file (https://github.com/multiversx/mx-chain-go/blob/rc/v1.7.next1/cmd/node/config/enableEpochs.toml)
  • for both observer nodes and proxy
• it should work with latest proxy version

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[gabi-vuls]

Normal allin test: 1.7.12-2a6916fbce -> update-enable-epochs-flags-c04c17e503

--- Specific errors ---

block hash does not match 286
wrong nonce in block 196
miniblocks does not match 0
num miniblocks does not match 0
miniblock hash does not match 0
block bodies does not match 0
receipts hash missmatch 0

/------/

--- Statistics ---

Nr. of all ERRORS: 1
Nr. of all WARNS: 252
Nr. of new ERRORS: 1
Nr. of new WARNS: 4
Nr. of PANICS: 0

/------/

--- ERRORS ---

/------/