Sync eng/common directory with azure-sdk-tools for PR 8875 (#5941)

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

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

---------

Co-authored-by: Siddharth Singha Roy <[email protected]>
Co-authored-by: Wes Haggard <[email protected]>

Author: 3 people

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",