test(related-products): add dedupe meta reducer integration test

[griest024]

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/graycoreio/daffodil/blob/master/CONTRIBUTING.md#commit
• [x] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[x] Other... Please describe: test

What is the new behavior?

Added an integration test for ensuring that the deduping with the meta reducer behaves as expected.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[lderrickable]

build fails

[griest024]

build fails

I know, I don't know how to fix it. See the discussion in discord