test(x/bank): write integration tests

[likhita-809]

Description

ref: #14145

This PR deduplicates bank's keeper tests and migrates bank's deterministic tests to use new testing framework.

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Author Checklist

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• included the correct type prefix in the PR title
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• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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• confirmed the correct type prefix in the PR title
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• manually tested (if applicable)

[tac0turtle]

could you add in the description where the duplicate tests are? cant seem to find them in the msg_server_test.go file

[likhita-809]

could you add in the description where the duplicate tests are? cant seem to find them in the msg_server_test.go file

sorry, my bad for writing the description incorrectly. I removed duplicate keeper tests not integration tests and all the msg server tests are already covered in msg_server_test.go file and there is no need to rewrite them.
The de-duplicated keeper tests are tested in keeper_test.go

[tac0turtle]

nice find!!!

[julienrbrt]

Nice!

[julienrbrt]

I guess we need to wait for the GH API to be less flaky to be able to merge this.