Add migration to remove collective v1 storage

[noandrea]

What does it do?

Removes the storage entries for the Gov V1 collectives

What important points reviewers should know?

This is a followup PR from #2643 that did not properly clear the storage.

How to test

The PR can be tested with the try runtime command with the following steps:

• Build the project with try-runtime feature

cargo build --features try-runtime --release

Run the tests:

Moonbase

try-runtime \
--runtime target/release/wbuild/moonbase-runtime/moonbase_runtime.compact.compressed.wasm \
on-runtime-upgrade --print-storage-diff live --uri wss://rpc.api.moonbase.moonbeam.network:443 \
--pallet CouncilCollective TechCommitteeCollective 

Moonriver

try-runtime \
--runtime target/release/wbuild/moonriver-runtime/moonriver_runtime.compact.compressed.wasm \
on-runtime-upgrade --print-storage-diff live --uri wss://rpc.api.moonriver.moonbeam.network:443 \
--pallet CouncilCollective TechCommitteeCollective

Moonbeam (only when 2801 is enacted)

try-runtime \
--runtime target/release/wbuild/moonbeam-runtime/moonbeam_runtime.compact.compressed.wasm \
on-runtime-upgrade --print-storage-diff live --uri wss://rpc.api.moonbeam.network:443 \
--pallet CouncilCollective TechCommitteeCollective

[github-actions]

Coverage Report

@@                          Coverage Diff                          @@
##           master   noandrea-govv1-collective-storage      +/-   ##
=====================================================================
- Coverage   72.49%                              72.47%   -0.02%     
  Files         229                                 229              
+ Lines       70653                               70676      +23     
=====================================================================
  Hits        51219                               51219              
+ Misses      19434                               19457      +23     

Files Changed	Coverage

Coverage generated Tue Apr 2 07:58:16 UTC 2024