build: add go.work in gitignore

[julienrbrt]

Description

Closes: #13098

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Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

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)

[aaronc]

I do think having GOWORK=off in make test might be useful as the official way to test how CI will see things. If I want to run tests with my local setup I usually do go test ./... for each module

[julienrbrt]

It makes sense, updated!

[kocubinski]

Was this total reformat of CHANGELOG.md intentional?

[julienrbrt]

Was this total reformat of CHANGELOG.md intentional?

Not at first 😅, but I left it as it should still conform to our markdownlint configuration: https://github.com/cosmos/cosmos-sdk/blob/main/.markdownlint.json#L3