Add query and write tests for bulkWrite

[vic-tsang]

This PR contains:

• query and write tests for bulkWrite

Ref:

• Issue Add compatibility test for bulkWrite #403

[documentdb-triage-tool]

🤖 Auto-triaged by documentdb-triage-tool.

Applied: compatibility test, enhancement
Project fields suggested: Component test-coverage · Priority P2 · Effort XL · Status Needs Review
Confidence: 0.85 (mixed)

Reasoning

component from path globs (test-coverage); effort from diff stats (3039+48 LOC, 12 files); LLM: Adds new query and write test cases for bulkWrite operations, expanding test coverage for an existing feature area.

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[SaiPradyumn]

Missing: delete on view. The "update_on_view" test verifies updates are rejected, but the delete path is a separate op discriminator and should also be validated.

[SaiPradyumn]

Missing: replacement-style update (updateMods with no $ operators). The bulkWrite spec supports three update modes — operator ({$set: ...}), pipeline ([{$set: ...}]), and replacement ({x: 99}). Operator and pipeline are tested here, but replacement is absent. This is a distinct server code path where the entire document body is replaced (non-_id fields removed).

[SaiPradyumn]

Missing: arrayFilters success path. test_bulkWrite_errors.py verifies invalid arrayFilters produce
errors, but there's no test proving that a valid arrayFilters + $[identifier] update modifies the
correct nested elements.