Submitting custom events on an integration

[KateYoak]

What does this PR do?

Motivation

Additional Notes

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] PR title must be written as a CHANGELOG entry (see why)
• [ ] Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• [ ] PR must have changelog/ and integration/ labels attached

[codecov[bot]]

Codecov Report

Merging #12667 (b4ebadb) into master (0554f0f) will not change coverage. The diff coverage is n/a.

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[FlorentClarret]

Hi @KateYoak just a heads up that this PR is still a draft :) Let us know if this is ready for review.