MESH-2064 - Remove confidential identity logic.

[Neopallium]

changelog

modified API

• Removed Identity.add_investor_uniqueness_claim and Identity.add_investor_uniqueness_claim_v2.
• Removed Claim variants: InvestorUniqueness, NoData, and InvestorUniquenessV2.
• Removed ClaimType variants: InvestorUniqueness, NoType, and InvestorUniquenessV2.
• Removed type InvestorUid.
• Removed all confidential_identity_v1 and confidential_identity_v2 code.
• Removed storage from Asset pallet for Investor Uniqueness: BalanceOfAtScope, AggregateBalance, ScopeIdOf, and DisableInvestorUniqueness.
• Removed ScopeId, replaced with IdentityId (these two are the same types).

modified logic

• Remove IdentityId to ScopeId mapping.
• Use Asset::balance_of(ticker, did) instead of Asset::aggregate_balance_of(ticker, scope_id).

data migration

• Remove storage items from Asset pallet.
• Migration all Identity.Claims to new Claim enum without InvestorUniqueness variants.

[codecov[bot]]

Codecov Report

Merging #1493 (1f41cdd) into develop (a2f8cb2) will decrease coverage by 0.13%. The diff coverage is 60.00%.

@@             Coverage Diff             @@
##           develop    #1493      +/-   ##
===========================================
- Coverage    54.22%   54.10%   -0.13%     
===========================================
  Files          151      145       -6     
  Lines        32988    32401     -587     
===========================================
- Hits         17887    17529     -358     
+ Misses       15101    14872     -229     

Impacted Files	Coverage Δ
pallets/common/src/traits/asset.rs	0.00% <ø> (ø)
pallets/common/src/traits/identity.rs	3.92% <ø> (ø)
pallets/common/src/traits/mod.rs	0.00% <ø> (ø)
pallets/common/src/traits/statistics.rs	0.00% <0.00%> (ø)
pallets/runtime/common/src/runtime.rs	1.81% <ø> (ø)
pallets/runtime/develop/src/runtime.rs	3.65% <0.00%> (+0.02%)	:arrow_up:
pallets/test-utils/src/lib.rs	0.00% <0.00%> (ø)
pallets/weights/src/pallet_identity.rs	8.00% <ø> (+0.59%)	:arrow_up:
primitives/src/asset.rs	50.00% <ø> (+0.94%)	:arrow_up:
primitives/src/identity_id.rs	75.39% <ø> (-4.41%)	:arrow_down:
... and 8 more

... and 7 files with indirect coverage changes

[Neopallium]

TODO:

• [x] Add migration to clear removed storage items from Asset pallet: BalanceOfAtScope, AggregateBalance, ScopeIdOf, and DisableInvestorUniqueness.
• [x] Add migration to migration all Claims from old type to new type.
• [x] Test migrations.