Prepare Lisk Migrator v2.0.0 for rc

[sridharmeganathan]

Description

The purpose of this epic is to prepare the Lisk Migrator v2.0.0-rc.0 release

Tasks

• Optimize migrator implementation #1 #101
• Update Lisk SDK to v6.0.0-beta.1 #109
• Improve user config migration implementation #81
• Optimize migrator implementation #2 #110
• Update Token module asset creation #116
• Update migrator implementation #117
• Update Lisk SDK to v6.0.0-beta.4 #120
• Update MIN_CERTIFICATE_HEIGHT calculation #124
• Update Lisk SDK to v6.0.0-beta.5 #125
• Integrate CodeQL to CI #129
• Update Lisk SDK to v6.0.0-beta.6 #132
• Update migrator to read the node snapshot #131
• Update SDK to v6.0.0-beta.7 #137
• Update README #142
• Copy DB snapshot to support Lisk Core v4 legacy blocks query #140
• Update Lisk SDK dependencies #136
• Fix genesis block creation logic #147