feat(wpt): enable tests for response

[huancheng-trili]

Context

Part of JSTZ-303.
JSTZ-303

Description

Enable test suites for Response (interface, class).

Manually testing the PR

env UPDATE_EXPECT=1 cargo test --test wpt

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.51%. Comparing base (87abc69) to head (2364329).
Report is 1 commits behind head on main.

see 2 files with indirect coverage changes

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