Support Python E2E test remote call from main build (#47)

* Support Python E2E test remote call from main build

Author: zzhlogin

.github/workflows/application-signals-python-e2e-ec2-test.yml

@@ -39,6 +39,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
+          repository: ${{ inputs.caller-workflow-name == 'main-build' && 'aws-observability/aws-application-signals-test-framework' || github.repository }}
+          ref: ${{ inputs.caller-workflow-name == 'main-build' && 'main' || github.ref }}
           fetch-depth: 0
 
       - name: Generate testing id

.github/workflows/application-signals-python-e2e-eks-test.yml

@@ -41,6 +41,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
+          repository: ${{ inputs.caller-workflow-name == 'main-build' && 'aws-observability/aws-application-signals-test-framework' || github.repository }}
+          ref: ${{ inputs.caller-workflow-name == 'main-build' && 'main' || github.ref }}
           fetch-depth: 0
 
       - name: Download enablement script