Update OnRecvPacket method to panic when an error is returned by the VM (backport #1298)

[mergify]

This is an automatic backport of pull request #1298 done by Mergify.
Cherry-pick of 5edfd6c has failed:

On branch mergify/bp/releases/v0.3x/pr-1298
Your branch is up to date with 'origin/releases/v0.3x'.

You are currently cherry-picking commit 5edfd6c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   x/wasm/keeper/relay_test.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   x/wasm/keeper/relay.go
	both modified:   x/wasm/relay_test.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[codecov]

Codecov Report

Merging #1303 (8f1584c) into releases/v0.3x (d48bb69) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@                Coverage Diff                 @@
##           releases/v0.3x    #1303      +/-   ##
==================================================
- Coverage           57.49%   57.46%   -0.03%     
==================================================
  Files                  55       55              
  Lines                7460     7460              
==================================================
- Hits                 4289     4287       -2     
- Misses               2865     2866       +1     
- Partials              306      307       +1     

Impacted Files	Coverage Δ
x/wasm/keeper/relay.go	96.47% <100.00%> (ø)

... and 1 file with indirect coverage changes