chore(unit tests): Leverage existing topology logic for unit test internals (#10540)

* Checkpoint commit

* Checkpoint working iteration

* Refactor and add build_unit_test_sources skeleton

* Refactor logic to build unit test sources

* Refactor build test sinks

* Refactor sink to check conditions

* Remove some legacy code

* Refactor to use UnitTestSinkResult

* Handle test input errors

* Implement function to find leaf components

* Wire up topology disconnect error

* Fix condition checking and pass success tests

* Refactor sanitizing original config to pass route test

* Raise error on no events received

* Pass several more tests

* Refactor such that a source and sink is attached to each transform

* Remove unnecessary code and format

* Reorganize module

* Fix issues with route and topology connection tests

* Pass all existing tests

* Change unit_test.rs to mod.rs

* Quite info logs for test cmd

* Add unit test for branched transform

* Add test for task transform with multiple inputs

* Move tests into separate file

* Remove unused graph unchecked constructor

* Turn topology disconnect error into runtime error

* Remove inspections

* Wire up diagnostic output for failed conditions

* Refactor unit test construction using metadata struct

* Refactor unit test run output

* Fix clippy errors

* Remove unnecessary file from rebase mishap

* Remove unused test file

* Clean up comments and unnecessary code

* Reword route comment to expanded transform

* Add comment regarding shutdown trigger in unit test source

* Fix formatting

* Move build_inputs into hydrate source to avoid misuse

* Move build output into hydrate sinks to avoid misuse

* Use uuid for unit test component ids

* Add behavior tests for branching and task style transforms

* Fix formatting in new tests

* Simplify configuration input sanitizing logic

* Limit sources and sinks based on inputs/ouputs

Though adding a source and sink to every transform allows us to
trivially create valid topologies, doing so also has a significant
performance impact on tests involving large configs. Thus, we switch to
a more complex but performant method of adding sources and sinks only
where necessary, walking the topology to trim any unnecessary
components.

* Add new error message for disconnected topology

* Update outdated comment

* Refactor paths_to_sink_from and add corresponding tests

* Remove unnecessary clone

* Remove ConfigDiff field in unit test struct

* Add support for glob inputs