[CP 1326] chore: exclude .claude, tests/pytests, and knowledge folders from mar…

[ci-penbot-01]

cp of pensando/gpu-operator#1326

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Source PR Description (pensando/gpu-operator#1326):

…kdown linting

Add .claude, tests/pytests, and knowledge directories to markdownlint ignore patterns to prevent linting of test artifacts and AI-generated documentation.

Cherrypick triggered by: ACP-Automation

[ci-penbot-01]

AI-Assisted Cherry-Pick

Source PR: #1326
Target Branch: main

The cherry-pick operation encountered merge conflicts which were resolved automatically using AI assistance.

Files with conflicts (resolved by AI):

• .markdownlint-cli2.jsonc:5-17
• docs/contributing/developer-guide.md:102-171

Original conflict in .markdownlint-cli2.jsonc

<<<<<<< HEAD
    "**/.git/**"
=======
    "**/.git/**",
    "**/ci-internal/**",
    "**/docs/cicd/**",
    "**/tests/e2e/**",
    "**/helm-charts-k8s/README.md",
    "**/internal-example/**",
    "**/.claude/**",
    "**/tests/pytests/**",
    "**/knowledge/**"
>>>>>>> 2fc32d2b... chore: exclude .claude, tests/pytests, and knowledge folders from mar… (#1326)

Original conflict in docs/contributing/developer-guide.md

<<<<<<< HEAD
=======
## GPU Operator E2E Tests

The `tests/k8s-e2e/` directory contains an e2e test suite that installs the GPU Operator via Helm and verifies metrics and health. Tests run against a live Kubernetes cluster.

### Prerequisites

- A running Kubernetes cluster with at least one AMD GPU node
- `kubectl` configured (`~/.kube/config` or a custom kubeconfig)
- Docker (to build the test runner image)

### Test runner image

```bash
docker build -t gpu-op-k8s-e2e:latest -f tests/k8s-e2e/Dockerfile.e2e tests/k8s-e2e/

Running tests

Full install + verify + teardown

Pass the helm chart as a local directory path (the helm-charts-k8s/ directory in the repository root) or an OCI/repo reference if publishing to a registry:

docker run --rm \
  -v /path/to/kubeconfig:/kubeconfig:ro \
  -v /path/to/gpu-operator/helm-charts-k8s:/helm-charts:ro \
  gpu-op-k8s-e2e:latest \
  -kubeconfig /kubeconfig \
  -operatorchart /helm-charts \
  -operatortag v1.5.0 \
  -test.timeout 60m

Verify only (pre-deployed cluster)

docker run --rm -v /path/to/kubeconfig:/kubeconfig:ro \
  gpu-op-k8s-e2e:latest \
  -kubeconfig /kubeconfig -existing \
  -check.f 'TestOp010|TestOp020|TestOp030|TestOp040|TestOp050|TestOp060|TestOp065|TestOp070' \
  -test.timeout 30m

Using make

# Full install+verify+teardown
make -C tests/k8s-e2e all KUBECONFIG=/path/to/kubeconfig OPERATOR_TAG=v1.5.0

# Verify only (pre-deployed)
make -C tests/k8s-e2e verify KUBECONFIG=/path/to/kubeconfig

Common flags

Flag	Default	Description
-kubeconfig	~/.kube/config	Path to kubeconfig
-operatorchart	OCI registry chart	GPU Operator helm chart (OCI ref or local path)
-operatortag	v1.4.1	GPU Operator chart version
-namespace	kube-amd-gpu	Kubernetes namespace
-existing	false	Skip install/teardown — verify only against pre-deployed cluster
-noteardown	false	Skip teardown after tests (leave operator installed)
-helmset	(none)	Extra helm --set override (repeatable)
-check.f	(all)	Regex filter for test names (gocheck syntax)
-test.timeout	30m	Overall test timeout

2fc32d2b... chore: exclude .claude, tests/pytests, and knowledge folders from mar… (#1326)

</details>


*Cherry-pick triggered by: ACP-Automation*