Add fast path for net_io_counters on Windows to reduce idle CPU usage (#9161)

[kishansaaai]

Description

This PR addresses high idle CPU usage on Windows (#9161) caused by the frequency and overhead of psutil.net_io_counters() inside Dask's system monitoring code.

Root Cause

On Windows, \psutil.net_io_counters()\ queries all adapter properties (DNS, IP addresses, multicast, unicast details, friendly names, etc.) and performs a double call to \GetAdaptersAddresses\ to determine buffer sizes. This compounds across workers, leading to high idle CPU load.

Fix

This PR introduces a Windows-only fast path utilizing \ctypes\ to invoke \GetAdaptersAddresses\ and \GetIfEntry2\ directly.

• Skips DNS, unicast, anycast, and multicast address details (\GAA_FLAG_SKIP_*).
• Pre-allocates and caches the buffer size to avoid redundant size query calls.
• Queries interface stats with \GetIfEntry2\ and sums them.
• Returns a compatible namedtuple structure.
• Defaults safely to \psutil.net_io_counters()\ on any exceptions.

Benchmarks (Windows)

• psutil.net_io_counters(): ~12.2 ms per call
• _fast_net_io_counters(): ~5.4 ms per call
• Speedup: ~2.3x faster on average.

Closes #9161

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    40 files  ± 0      40 suites  ±0   14h 29m 4s ⏱️ - 13m 58s
 4 155 tests + 2   3 971 ✅ + 2    178 💤 ± 0  5 ❌  - 1  1 🔥 +1 
80 861 runs  +41  76 587 ✅ +10  4 268 💤 +31  5 ❌  - 1  1 🔥 +1 

For more details on these failures and errors, see this check.

Results for commit 8bd071e. ± Comparison against base commit 3b0ba32.

♻️ This comment has been updated with latest results.