Update CosmWasm dependencies to v2

[seanchen1991]

Closes: #1242

Description

---

PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

Attention: Patch coverage is 85.05882% with 508 lines in your changes missing coverage. Please review.

Project coverage is 67.26%. Comparing base (d5e3887) to head (d331d58).
Report is 37 commits behind head on main.

Files	Patch %	Lines
ibc-testkit/src/testapp/ibc/core/core_ctx.rs	40.82%	287 Missing ⚠️
ibc-testkit/src/relayer/context.rs	83.71%	72 Missing ⚠️
ibc-clients/cw-context/src/context/mod.rs	50.00%	36 Missing ⚠️
ibc-testkit/src/context.rs	92.64%	30 Missing ⚠️
ibc-testkit/src/relayer/utils.rs	98.12%	17 Missing ⚠️
ibc-core/ics03-connection/src/handler/mod.rs	50.00%	12 Missing ⚠️
ibc-testkit/src/testapp/ibc/core/client_ctx.rs	93.87%	9 Missing ⚠️
ibc-clients/cw-context/src/context/client_ctx.rs	61.53%	5 Missing ⚠️
ibc-apps/ics721-nft-transfer/types/src/class.rs	86.66%	4 Missing ⚠️
ibc-testkit/src/hosts/mod.rs	92.15%	4 Missing ⚠️
... and 15 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1251      +/-   ##
==========================================
+ Coverage   64.39%   67.26%   +2.86%     
==========================================
  Files         230      235       +5     
  Lines       22053    23516    +1463     
==========================================
+ Hits        14201    15817    +1616     
+ Misses       7852     7699     -153     

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[rnbguy]

Thanks Sean, for taking care of this 🙌