cibuildwheel not necessary in build-system metadata for azure-storage-extensions (#46226)

* Add extra line to dev_requirements.txt to trigger build

* Fix macOS build failure: remove cibuildwheel from build-system.requires

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* Add comment to pyproject.toml to clarify cibuildwheel is not a build-system dep (forces new CI run)

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Author: Copilot

sdk/storage/azure-storage-extensions/pyproject.toml

@@ -13,7 +13,8 @@ breaking = false
 suppressed_skip_warnings = ["*"]
 
 [build-system]
-requires = ["setuptools", "wheel", "cibuildwheel"]
+# cibuildwheel is NOT a build-system dependency; it is the outer orchestration tool
+requires = ["setuptools", "wheel"]
 
 [tool.cibuildwheel]
 build = ["cp39*", "pp39*", "pp310*", "pp311*"]