chore(orm)!: rename orm package to use a vanity url

[julienrbrt]

Description

ref: cosmos/vanity#43, #15138 (comment)
I gladly use the right package in my group migration PR and have an extra beta tag with that renaming because the previous tag is quite old.

@aaronc what do you think of tagging another beta after this?

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I have...

• included the correct type prefix in the PR title
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• included the necessary unit and integration tests
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[julienrbrt]

Tagged https://github.com/cosmos/cosmos-sdk/releases/tag/orm%2Fv1.0.0-beta.1 with this.