test: Fix Gemma3 unit tests due to transformers upgrade

[brb-nv]

Description

Unfortunately, latest transformers update broke Gemma3 unit tests. There have been API changes as well as broad changes to HybridCache in transformers. So, I'm updating the tests to have as little customization as possible.

Also, adding existing tests to CI and new e2e test to CI.

$ python3 examples/llm-api/quickstart_multimodal.py --model_dir ../random/hf_models/gemma-3-27b-it/ --modality image --image_format pil --attention_backend FLASHINFER --disable_kv_cache_reuse

Test Coverage

- unittest/_torch/modeling -k "modeling_gemma3"
- test_e2e.py::test_ptp_quickstart_multimodal[gemma-3-27b-it-gemma/gemma-3-27b-it-image-False]

GitHub Bot Help

/bot [-h] ['run', 'kill', 'skip', 'reuse-pipeline'] ...

Provide a user friendly way for developers to interact with a Jenkins server.

Run /bot [-h|--help] to print this help message.

See details below for each supported subcommand.

run [--disable-fail-fast --skip-test --stage-list "A10-1, xxx" --gpu-type "A30, H100_PCIe" --add-multi-gpu-test --only-multi-gpu-test --disable-multi-gpu-test --post-merge --extra-stage "H100_PCIe-[Post-Merge]-1, xxx"]

Launch build/test pipelines. All previously running jobs will be killed.

--disable-fail-fast (OPTIONAL) : Disable fail fast on build/tests/infra failures.

--skip-test (OPTIONAL) : Skip all test stages, but still run build stages, package stages and sanity check stages. Note: Does NOT update GitHub check status.

--stage-list "A10-1, xxx" (OPTIONAL) : Only run the specified test stages. Examples: "A10-1, xxx". Note: Does NOT update GitHub check status.

--gpu-type "A30, H100_PCIe" (OPTIONAL) : Only run the test stages on the specified GPU types. Examples: "A30, H100_PCIe". Note: Does NOT update GitHub check status.

--only-multi-gpu-test (OPTIONAL) : Only run the multi-GPU tests. Note: Does NOT update GitHub check status.

--disable-multi-gpu-test (OPTIONAL) : Disable the multi-GPU tests. Note: Does NOT update GitHub check status.

--add-multi-gpu-test (OPTIONAL) : Force run the multi-GPU tests. Will also run L0 pre-merge pipeline.

--post-merge (OPTIONAL) : Run the L0 post-merge pipeline instead of the ordinary L0 pre-merge pipeline.

--extra-stage "H100_PCIe-[Post-Merge]-1, xxx" (OPTIONAL) : Run the ordinary L0 pre-merge pipeline and specified test stages. Examples: --extra-stage "H100_PCIe-[Post-Merge]-1, xxx".

For guidance on mapping tests to stage names, see docs/source/reference/ci-overview.md.

kill

kill

Kill all running builds associated with pull request.

skip

skip --comment COMMENT

Skip testing for latest commit on pull request. --comment "Reason for skipping build/test" is required. IMPORTANT NOTE: This is dangerous since lack of user care and validation can cause top of tree to break.

reuse-pipeline

reuse-pipeline

Reuse a previous pipeline to validate current commit. This action will also kill all currently running builds associated with the pull request. IMPORTANT NOTE: This is dangerous since lack of user care and validation can cause top of tree to break.

[brb-nv]

/bot run

[tensorrt-cicd]

PR_Github #11564 [ run ] triggered by Bot

[2ez4bz]

LGTM.

[brb-nv]

/bot run

[tensorrt-cicd]

PR_Github #11565 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #11564 [ run ] completed with state ABORTED

[tensorrt-cicd]

PR_Github #11565 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #8562 completed with status: 'FAILURE'

[brb-nv]

/bot run

[tensorrt-cicd]

PR_Github #11572 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #11572 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #8567 completed with status: 'SUCCESS'