Separate messages for each required policy group

[lumtis]

https://github.com/zeta-chain/node/pull/1552#discussion_r1449091703

For simplicity and better maintainability, each message should have a single policy group requirement.

We should change it for MsgUpdateCrosschainFlags and list other message with different policy group requirements

[kingpinXD]

We can refactor into the following messages. cc @lumtis

// MsgDisableCCTXflags -> PolicyType_groupEmergency
// Disable inbound and outbound transactions , Disable both or any one

// MsgEnableCCTXflags -> PolicyType_groupOperational
// Enable inbound and outbound transactions , Enable both or any one

// MsgUpdateGasPriceFlags -> PolicyType_groupOperational . Update values
// Update gas price flags

[lumtis]

Yes, this can looks like this.

[kingpinXD]

Broke this down into issue #2244 and #2245

[kingpinXD]

Closing this issue , and working on the new issues listed above