feat(x/gov): emit depositor in proposal_deposit event (backport #19853)

[mergify]

Description

Closes: #19849

Emit depositor in proposal_deposit event in AddDeposit function

Author Checklist

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please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• confirmed ! in 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
• reviewed "Files changed" and left comments if necessary
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• updated the relevant documentation or specification, including comments for documenting Go code
• confirmed all CI checks have passed

Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
• confirmed all author checklist items have been addressed
• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage

Summary by CodeRabbit

• New Features
  • Enhanced event details for deposits by including the depositor's address information.

---

This is an automatic backport of pull request #19853 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of d1c3547 has failed:

On branch mergify/bp/release/v0.50.x/pr-19853
Your branch is up to date with 'origin/release/v0.50.x'.

You are currently cherry-picking commit d1c3547d8.
  (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)

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   x/gov/CHANGELOG.md
	both modified:   x/gov/keeper/deposit.go
	both modified:   x/gov/keeper/proposal.go
	both modified:   x/gov/types/events.go

no changes added to commit (use "git add" and/or "git commit -a")

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

[julienrbrt]

Fix chsngelog + build