Duplicate implementation of functionality.

[ishantiw]

Description

The interoperability module calculates a CCM ID by encoding the CCM and hashing the result. The code hard codes this in multiple parts of the code instead of implementing it in a single-centralized function. This code is repeated in,
https://github.com/LiskHQ/lisk-sdk/blob/89e7504ef5eb6183aefe576a93be3d6052e56038/framework/src/modules/interoperability/mainchain/commands/submit_mainchain_cross_chain_update.ts#L138
https://github.com/LiskHQ/lisk-sdk/blob/89e7504ef5eb6183aefe576a93be3d6052e56038/framework/src/modules/interoperability/mainchain/commands/recover_message.ts#L410
https://github.com/LiskHQ/lisk-sdk/blob/89e7504ef5eb6183aefe576a93be3d6052e56038/framework/src/modules/interoperability/mainchain/commands/recover_message.ts#L188

Instead, the getEncodedCCMAndID function could be used. Alternatively, another function that just calculates the ID from the encoded CCM could also be created.

Which version(s) does this affect? (Environment, OS, etc...)

v6.0.0-beta.1