Sync eng/common directory with azure-sdk-tools for PR 8875 (#37054)

* chore(): add playwright-testing to product slugs

* Update eng/common/scripts/Test-SampleMetadata.ps1

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Co-authored-by: Siddharth Singha Roy <ssingharoy@microsoft.com>
Co-authored-by: Wes Haggard <weshaggard@users.noreply.github.com>

eng/common/scripts/Test-SampleMetadata.ps1

@@ -422,6 +422,8 @@ begin {
         "office-word",
         "office-yammer",
         "passport-azure-ad",
+        "playwright",
+        "playwright-testing",
         "power-apps",
         "power-automate",
         "power-bi",