Add debug variables parameter to 1p-e2e pipeline (#7131)

Adds a parameter that adds a step that prints certain key configuration
variables for debugging purposes

.pipelines/1p-e2e.yml

@@ -1,3 +1,8 @@
+parameters:
+    - name: "debugVariables"
+      displayName: "Debug Variables"
+      type: boolean
+      default: false
 variables:
     CDP_DEFINITION_BUILD_COUNT: $[counter('', 0)] # needed for onebranch.pipeline.version task https://aka.ms/obpipelines/versioning
     LinuxContainerImage: "mcr.microsoft.com/onebranch/cbl-mariner/build:2.0" # Docker image which is used to build the project https://aka.ms/obpipelines/containers
@@ -43,3 +48,4 @@ extends:
                         samples:
                             - "Broker_WAMTestApp"
                             - "PerformanceTelemetrySample"
+                        debugVariables: ${{ parameters.debugVariables }}