Test-Proxy enabled by default (#36573)

* default test-proxy to being utilized
* update argument from core so that language-specific cert trust step doesn't mess with the tests

Author: scbedd

eng/pipelines/templates/stages/archetype-sdk-client.yml

@@ -68,7 +68,7 @@ parameters:
     default: false
   - name: TestProxy
     type: boolean
-    default: false
+    default: true
   - name: GenerateApiReviewForManualOnly
     type: boolean
     default: false

sdk/core/ci.yml

@@ -37,6 +37,7 @@ extends:
     ServiceDirectory: core
     BuildTargetingString: "*"
     ValidateFormatting: true
+    TestProxy: false
     Artifacts:
     - name: azure-core
       safeName: azurecore