Fix create-pull-request bug (Azure#12001)

Co-authored-by: Chidozie Ononiwu <chononiw@microsoft.com>

Author: azure-sdk

eng/common/pipelines/templates/steps/create-pull-request.yml

@@ -86,4 +86,4 @@ steps:
       -UserReviewers "${{ parameters.GHReviewersVariable }}"
       -TeamReviewers "${{ parameters.GHTeamReviewersVariable }}"
       -Assignees "${{ parameters.GHAssignessVariable }}"
-      -CloseAfterOpenForTesting $${{ parameters.CloseAfterOpenForTesting }}
+      -CloseAfterOpenForTesting $${{ coalesce(parameters.CloseAfterOpenForTesting, 'false') }}

eng/common/pipelines/templates/steps/docs-metadata-release.yml

@@ -18,6 +18,7 @@ parameters:
   GHReviewersVariable: '' 
   GHTeamReviewersVariable: '' # externally set, as eng-common does not have the identity-resolver. Run as pre-step
   OnboardingBranch: ''
+  CloseAfterOpenForTesting: false
 
 steps:
 - pwsh: |
@@ -83,7 +84,7 @@ steps:
     GHReviewersVariable: ${{ parameters.GHReviewersVariable }}
     GHTeamReviewersVariable: ${{ parameters.GHTeamReviewersVariable }} 
     PRLabels: ${{ parameters.PRLabels }}
-    CloseAfterOpenForTesting: $(TestPipeline)
+    CloseAfterOpenForTesting: ${{ parameters.CloseAfterOpenForTesting }}
 
 - ${{if ne( parameters['OnboardingBranch'], '')}}:
   - pwsh: |
@@ -124,4 +125,4 @@ steps:
       ScriptDirectory: ${{ parameters.WorkingDirectory }}/${{ parameters.ScriptDirectory }}
       GHReviewersVariable: ${{ parameters.GHReviewersVariable }}
       GHTeamReviewersVariable: ${{ parameters.GHTeamReviewersVariable }}
-      CloseAfterOpenForTesting: $(TestPipeline)
+      CloseAfterOpenForTesting: ${{ parameters.CloseAfterOpenForTesting }}

eng/common/scripts/Invoke-GitHubAPI.ps1

@@ -35,7 +35,7 @@ function Invoke-GitHubAPIPost {
     else {
       $warning = "{0} with Uri [ $apiURI ] did not fire request because of empty body." -f (Get-PSCallStack)[1].FunctionName
       LogWarning $warning
-      exit 0
+      return $null
     }
   }
   catch {
@@ -69,7 +69,7 @@ function Invoke-GitHubAPIPatch {
     else {
       $warning = "{0} with Uri [ $apiURI ] did not fire request because of empty body." -f (Get-PSCallStack)[1].FunctionName
       LogWarning $warning
-      exit 0
+      return $null
     }
   }
   catch {