tests: add ideogram4 tests for pipelines. (#14599)

* tests: add ideogram4 tests for pipelines.

* skip callback tests

* Update tests/pipelines/ideogram4/test_pipeline_ideogram4.py

Co-authored-by: dg845 <58458699+dg845@users.noreply.github.com>

* up

* up

* allow pipeline level group offloading test

* loosen tolerance.

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Co-authored-by: dg845 <58458699+dg845@users.noreply.github.com>