Support CosmosDB conditional update

[jprochazk]

Feature Summary

Add ability to use the conditional update mode of the partial document update feature

Feature Description

The REST API supports this via condition: https://learn.microsoft.com/en-us/rest/api/cosmos-db/patch-a-document#conditional-patch-operation

It seems like support could be added by introducing the condition field as a String here:

azure-sdk-for-rust/sdk/cosmos/azure_data_cosmos/src/models/patch_operations.rs

Lines 41 to 43 in bbfd1b0

	pub struct PatchDocument {
	pub operations: Vec<PatchOperation>,
	}

Ideally, it wouldn't be a string, but also some kind of strongly-typed builder which produces the filter string, to prevent issues caused by typos in the SQL expression.

Use Case

Required for atomic conditional document updates

Alternatives

No response

Additional Context

No response