feat(perp): Create query for the stateful collateral metadata

[matthiasmatt]

To be reviewed after #1656

• Completes feat(perp): Make the collateral denom a stateful collections.Item #1656 by adding and wiring a query to see the current state of the collateral used by the module. It returns the denom of the collateral used.
• Closes feat(perp): Make the collateral denom a stateful collections.Item #1640

[codecov]

Codecov Report

Merging #1669 (c9e9c41) into master (5e9a419) will decrease coverage by 0.04%.
Report is 3 commits behind head on master.
The diff coverage is 46.52%.

❗ Current head c9e9c41 differs from pull request most recent head 9585ef4. Consider uploading reports for the commit 9585ef4 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1669      +/-   ##
==========================================
- Coverage   73.82%   73.79%   -0.04%     
==========================================
  Files         192      191       -1     
  Lines       15211    15214       +3     
==========================================
- Hits        11230    11227       -3     
- Misses       3329     3332       +3     
- Partials      652      655       +3     

Files	Coverage Δ
x/common/testutil/cli/network.go	74.11% <100.00%> (ø)
x/perp/v2/keeper/keeper.go	96.87% <100.00%> (-0.05%)	⬇️
x/perp/v2/types/genesis.go	85.36% <100.00%> (ø)
x/perp/v2/types/msgs.go	91.41% <ø> (+8.63%)	⬆️
x/tokenfactory/types/state.go	96.72% <0.00%> (ø)
wasmbinding/exec_perp.go	85.62% <40.00%> (-1.41%)	⬇️
x/perp/v2/keeper/amm.go	89.83% <57.14%> (ø)
x/perp/v2/keeper/grpc_query.go	70.28% <72.72%> (+0.21%)	⬆️
x/perp/v2/keeper/admin.go	87.36% <62.50%> (-3.16%)	⬇️
x/perp/v2/keeper/clearing_house.go	76.89% <57.14%> (ø)
... and 5 more

... and 6 files with indirect coverage changes