ci: simplify e2e workflow - remove workflow_call complexity

Restore simple pull_request + workflow_dispatch triggers.
The gate workflow with ok-to-test can be added in a future PR
after this one is merged to main.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: clubanderson

.github/workflows/ci-e2e-openshift.yaml

@@ -6,54 +6,10 @@ permissions:
   packages: write
 
 on:
-  # Direct trigger on PRs (temporary until gate workflow is on main)
   pull_request:
     branches:
       - main
       - dev
-  # Called by the gate workflow after ok-to-test approval
-  workflow_call:
-    inputs:
-      ref:
-        description: 'Git ref to checkout (SHA for PRs)'
-        required: false
-        type: string
-      model_id:
-        description: 'Model ID'
-        required: false
-        type: string
-        default: 'unsloth/Meta-Llama-3.1-8B'
-      accelerator_type:
-        description: 'Accelerator type (H100, A100, L40S)'
-        required: false
-        type: string
-        default: 'H100'
-      request_rate:
-        description: 'Request rate (req/s)'
-        required: false
-        type: string
-        default: '20'
-      num_prompts:
-        description: 'Number of prompts'
-        required: false
-        type: string
-        default: '3000'
-      skip_cleanup:
-        description: 'Skip cleanup after tests'
-        required: false
-        type: string
-        default: 'true'
-      max_num_seqs:
-        description: 'vLLM max batch size (lower = easier to saturate)'
-        required: false
-        type: string
-        default: '1'
-      hpa_stabilization_seconds:
-        description: 'HPA stabilization window in seconds'
-        required: false
-        type: string
-        default: '30'
-  # Manual trigger for maintainers
   workflow_dispatch:
     inputs:
       model_id:
@@ -94,8 +50,6 @@ jobs:
     steps:
       - name: Checkout source
         uses: actions/checkout@v4
-        with:
-          ref: ${{ inputs.ref || github.sha }}
 
       - name: Log in to GHCR
         uses: docker/login-action@v3
@@ -109,9 +63,7 @@ jobs:
         env:
           REGISTRY: ghcr.io
           IMAGE_NAME: ${{ github.repository }}
-          # Use inputs.ref when available, otherwise fall back to GITHUB_SHA
-          # Note: inputs.ref could be a branch, tag, or SHA - we use the first 8 characters for tagging
-          GIT_REF: ${{ inputs.ref || github.sha }}
+          GIT_REF: ${{ github.sha }}
         run: |
           # Build image with git ref tag for this PR
           # Use first 8 chars of the git ref
@@ -132,14 +84,13 @@ jobs:
     runs-on: [self-hosted, openshift]
     needs: build-image
     env:
-      # Handle inputs from both workflow_call (inputs.*) and workflow_dispatch (github.event.inputs.*)
-      MODEL_ID: ${{ inputs.model_id || github.event.inputs.model_id || 'unsloth/Meta-Llama-3.1-8B' }}
-      ACCELERATOR_TYPE: ${{ inputs.accelerator_type || github.event.inputs.accelerator_type || 'H100' }}
-      REQUEST_RATE: ${{ inputs.request_rate || github.event.inputs.request_rate || '20' }}
-      NUM_PROMPTS: ${{ inputs.num_prompts || github.event.inputs.num_prompts || '3000' }}
-      MAX_NUM_SEQS: ${{ inputs.max_num_seqs || github.event.inputs.max_num_seqs || '1' }}
-      HPA_STABILIZATION_SECONDS: ${{ inputs.hpa_stabilization_seconds || github.event.inputs.hpa_stabilization_seconds || '30' }}
-      SKIP_CLEANUP: ${{ inputs.skip_cleanup || github.event.inputs.skip_cleanup || 'true' }}
+      MODEL_ID: ${{ github.event.inputs.model_id || 'unsloth/Meta-Llama-3.1-8B' }}
+      ACCELERATOR_TYPE: ${{ github.event.inputs.accelerator_type || 'H100' }}
+      REQUEST_RATE: ${{ github.event.inputs.request_rate || '20' }}
+      NUM_PROMPTS: ${{ github.event.inputs.num_prompts || '3000' }}
+      MAX_NUM_SEQS: ${{ github.event.inputs.max_num_seqs || '1' }}
+      HPA_STABILIZATION_SECONDS: ${{ github.event.inputs.hpa_stabilization_seconds || '30' }}
+      SKIP_CLEANUP: ${{ github.event.inputs.skip_cleanup || 'true' }}
       # Unique release names per run to avoid conflicts with other concurrent runs
       WVA_RELEASE_NAME: wva-e2e-${{ github.run_id }}
       LLMD_RELEASE_SUFFIX: e2e-${{ github.run_id }}
@@ -148,8 +99,6 @@ jobs:
     steps:
       - name: Checkout source
         uses: actions/checkout@v4
-        with:
-          ref: ${{ inputs.ref || github.sha }}
 
       - name: Extract Go version from go.mod
         run: sed -En 's/^go (.*)$/GO_VERSION=\1/p' go.mod >> $GITHUB_ENV