fix blob GC test

[wes-carlson]

This was caused by #10621, which added support for blob handles using local IDs while offline. Due to a race condition, the container would not always be connected and uploadBlob() would return a local ID handle instead of one using the storage ID as the test expected, which would cause it to fail. I hit similar issues in other tests in the PR, but this seems to only happen against ODSP, not when run locally.

https://github.com/microsoft/FluidFramework/pull/10621/files#diff-aa6ab18dfe191259e467ea83ba348405ff244fbc66f8d5dfe2fc0d7ec62dcbf7