feat(aggregate): Add option to control interval

[rcassetta-figma]

• Add option for forcing interval
• . Proof of concept to show how we could add better functionality for aggregating rates

Summary

Related issue https://github.com/vectordotdev/vector/issues/23183

Change Type

• [ ] Bug fix
• [ ] New feature
• [ ] Non-functional (chore, refactoring, docs)
• [ ] Performance

Is this a breaking change?

• [ ] Yes
• [ ] No

How did you test this PR?

Does this PR include user facing changes?

• [ ] Yes. Please add a changelog fragment based on our guidelines.
• [ ] No. A maintainer will apply the "no-changelog" label to this PR.

Notes

• Please read our Vector contributor resources.
• Do not hesitate to use @vectordotdev/vector to reach out to us regarding this PR.
• The CI checks run only after we manually approve them.
  • We recommend adding a pre-push hook, please see this template.
  • Alternatively, we recommend running the following locally before pushing to the remote branch:
    • cargo fmt --all
    • cargo clippy --workspace --all-targets -- -D warnings
    • cargo nextest run --workspace (alternatively, you can run cargo test --all)
    • ./scripts/check_changelog_fragments.sh
• After a review is requested, please avoid force pushes to help us review incrementally.
  • Feel free to push as many commits as you want. They will be squashed into one before merging.
  • For example, you can run git merge origin master and git push.
• If this PR introduces changes Vector dependencies (modifies Cargo.lock), please run cargo vdev build licenses to regenerate the license inventory and commit the changes (if any). More details here.

References

[bits-bot]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}