Update packages with integration testing requirements - Observability
Update the `docs/DEVELOPMENT_MAINTENANCE.md` docs with a `# Files That Require Integration Testing`. For the definition of those, see [the epic description](https://repo1.dso.mil/groups/big-bang/-/epics/335#description). Ensure to include [the instructions on how to run integration tests](https://repo1.dso.mil/big-bang/bigbang/-/blob/master/docs/developer/test-package-against-bb.md?ref_type=heads).
If any child items that should be updated are missing please add them.
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