Cosmos DB: update missing field behavior

[algattik]

What this PR changes/adds

Fix failing Cosmos DB integration test CosmosContractNegotiationStoreIntegrationTest.

Why it does that

Cosmos DB behavior recently changed as documented: Queries with ORDER BY will return all items, including items where the property in the ORDER BY clause isn't defined.

Further notes

Also fixed logic for failing org.eclipse.dataspaceconnector.cosmos.policy.store.CosmosPolicyDefinitionStoreIntegrationTest#verify_readWriteFindAll

Linked Issue(s)

Closes #1512

Checklist

• added appropriate tests?
• performed checkstyle check locally?
• added/updated copyright headers?
• documented public classes/methods?
• added/updated relevant documentation?
• added relevant details to the changelog? (skip with label no-changelog)
• formatted title correctly? (take a look at the CONTRIBUTING and styleguide for details)