Sparse live tests (Azure#25983)

Author: pakrym

eng/pipelines/templates/jobs/live.tests.yml

@@ -77,6 +77,13 @@ jobs:
       container: $[ variables['Container'] ]
 
     steps:
+      - ${{ if not(contains(variables['Build.DefinitionName'], '-pr - ')) }}:
+        - template: /eng/common/pipelines/templates/steps/sparse-checkout.yml
+          parameters:
+              Paths:
+                - "/*"
+                - "!SessionRecords"
+
       - ${{ parameters.PreSteps }}
 
       - template: /eng/common/pipelines/templates/steps/verify-agent-os.yml
@@ -119,6 +126,7 @@ jobs:
           /p:IncludeSrc=false /p:IncludeSamples=false /p:IncludePerf=false /p:IncludeStress=false
           /p:BuildInParallel=${{ parameters.BuildInParallel }}
           /p:CollectCoverage=$(CollectCoverage) /p:CodeCoverageDirectory=$(Build.SourcesDirectory)\sdk\${{parameters.ServiceDirectory}}
+          /p:EnableSourceLink=false
           $(AdditionalTestArguments)
 
         displayName: "Build & Test (all tests for $(TestTargetFramework))"