[Blazor] Remove DOTNET_EnableAVX512=0 from Blazor E2E test pipeline (#63269)

Removes the workaround for the issue with the Base64 encoding vectorization.

Author: Copilot

.azure/pipelines/components-e2e-tests.yml

@@ -98,17 +98,13 @@ jobs:
           exit 1
         fi
       displayName: Run E2E tests
-      env:
-        DOTNET_EnableAVX512: 0
     - script: .dotnet/dotnet test ./src/Components/test/E2ETest -c $(BuildConfiguration) --no-build --filter 'Quarantined=true' -p:RunQuarantinedTests=true
                  -p:VsTestUseMSBuildOutput=false
                  --logger:"trx%3BLogFileName=Microsoft.AspNetCore.Components.E2ETests.trx"
                  --logger:"html%3BLogFileName=Microsoft.AspNetCore.Components.E2ETests.html"
                  --results-directory $(Build.SourcesDirectory)/artifacts/TestResults/$(BuildConfiguration)/Quarantined
       displayName: Run Quarantined E2E tests
       continueOnError: true
-      env:
-        DOTNET_EnableAVX512: 0
     - task: PublishTestResults@2
       displayName: Publish E2E Test Results
       inputs: