Patch precondition returns OK when it should be 'precondition failed'

[onionhammer]

Describe the bug I have a test which runs a patch operation with two preconditions and a filter predicate, In the test I expect that I will receive a precondition failed, Running against an actual Cosmos database in Azure I get the expected result when I run the emulator preview I receive an OK result.

To Reproduce

1. Create a document
2. Patch the document by adding a new string, like "/Value = hello" and a filter predicate of "WHERE NOT IS_STRING(c.Value)
3. Repeat step 2

Expected behavior Should receive response 'PreconditionFailed'

**Docker Images Used: **

• Linux: mcr.microsoft.com/cosmosdb/linux/azure-cosmos-emulator:vnext-preview