[WIP] Revert implementation of Blob factory function

[Copilot]

Plan to revert commit 8b9f88b (PR #120) which added the Blob factory function:

• Understand the changes made in PR Blob: Add factory function #120
• Verify no dependencies on CreateInstance function
• Build and test the current codebase to establish baseline
• Remove CreateInstance from Polyfills/Blob/Include/Babylon/Polyfills/Blob.h
• Remove CreateInstance from Polyfills/Blob/Source/Blob.h
• Remove CreateInstance implementation from Polyfills/Blob/Source/Blob.cpp
• Restore JS_BLOB_CONSTRUCTOR_NAME to original location in Initialize method
• Remove trailing comma from InstanceMethod in Blob.cpp
• Build and test to verify changes work correctly
• Request code review
• Run security checks

Original prompt

Revert commit 8b9f88b, which was added in PR #120 and implemented a Blob factory function. The new pull request should include all necessary changes to undo this commit and restore the codebase to its prior state, ensuring that any tests or dependent code are also corrected if needed.

This pull request was created as a result of the following prompt from Copilot chat.

Revert commit 8b9f88b, which was added in PR #120 and implemented a Blob factory function. The new pull request should include all necessary changes to undo this commit and restore the codebase to its prior state, ensuring that any tests or dependent code are also corrected if needed.

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[alexchuber]

That was an epic fail.