Modify Genesis Test Action to Use Correct Repository (#429)

Genesis test is failing with: `Error: Can't find 'action.yml',
'action.yaml' or 'Dockerfile' under
'/home/runner/work/aws-otel-python-instrumentation/aws-otel-python-instrumentation/.github/workflows/actions/execute_and_retry'.
Did you forget to run actions/checkout before running your local
action?`

Added correct repository for `action/checkout`

Author: liustve

.github/workflows/python-ec2-genesis-test.yml

@@ -35,6 +35,10 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v4
+        with:
+          repository: 'aws-observability/aws-application-signals-test-framework'
+          ref: ${{ inputs.caller-workflow-name == 'main-build' && 'main' || github.ref }}
+          fetch-depth: 0
 
       - name: Set Get ADOT Wheel command environment variable
         run: |