feat(orm): allow bytes keys longer than 255 bytes

[aaronc]

Description

Closes: #11381

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Author Checklist

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• included the correct type prefix in the PR title
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• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #11522 (969db41) into master (3cf11e1) will increase coverage by 0.15%.
The diff coverage is 68.78%.

@@            Coverage Diff             @@
##           master   #11522      +/-   ##
==========================================
+ Coverage   65.96%   66.11%   +0.15%     
==========================================
  Files         675      715      +40     
  Lines       69832    72876    +3044     
==========================================
+ Hits        46065    48183    +2118     
- Misses      21073    21743     +670     
- Partials     2694     2950     +256     

Impacted Files	Coverage Δ
types/tx/ext.go	0.00% <0.00%> (ø)
types/tx/types.go	0.00% <0.00%> (ø)
x/auth/middleware/msg_service_router.go	80.59% <0.00%> (ø)
x/gov/keeper/deposit.go	81.14% <ø> (ø)
x/gov/keeper/grpc_query.go	58.12% <ø> (ø)
x/gov/keeper/keeper.go	77.10% <ø> (ø)
x/group/keeper/invariants.go	53.62% <ø> (+10.12%)	⬆️
x/genutil/gentx.go	86.15% <33.33%> (-2.56%)	⬇️
x/genutil/types/genesis_state.go	50.00% <55.55%> (-1.57%)	⬇️
x/auth/middleware/ext.go	61.76% <63.15%> (-6.24%)	⬇️
... and 49 more

[robert-zaremba]

lgtm, left few suggestions