Stabilize test suite: fix flaky timing tests, and handle Windows reso…#12075

Dreamsorcerer merged 1 commit into3.14aio-libs/aiohttp:3.14from

patchback/backports/3.14/32924e8fa4c9085dcbaf41b3b3c27fc773bfa213/pr-11992aio-libs/aiohttp:patchback/backports/3.14/32924e8fa4c9085dcbaf41b3b3c27fc773bfa213/pr-11992Copy head branch name to clipboard