Disable PowerShell update check in CI to prevent startup delays

Author: SteveSandersonMS

.github/workflows/dotnet-sdk-tests.yml

@@ -26,6 +26,8 @@ permissions:
 jobs:
   test:
     name: ".NET SDK Tests"
+    env:
+      POWERSHELL_UPDATECHECK: Off
     strategy:
       fail-fast: false
       matrix:

.github/workflows/go-sdk-tests.yml

@@ -26,6 +26,8 @@ permissions:
 jobs:
   test:
     name: "Go SDK Tests"
+    env:
+      POWERSHELL_UPDATECHECK: Off
     strategy:
       fail-fast: false
       matrix:

.github/workflows/nodejs-sdk-tests.yml

@@ -28,6 +28,8 @@ permissions:
 jobs:
   test:
     name: "Node.js SDK Tests"
+    env:
+      POWERSHELL_UPDATECHECK: Off
     strategy:
       fail-fast: false
       matrix:

.github/workflows/python-sdk-tests.yml

@@ -29,6 +29,8 @@ permissions:
 jobs:
   test:
     name: "Python SDK Tests"
+    env:
+      POWERSHELL_UPDATECHECK: Off
     strategy:
       fail-fast: false
       matrix: