Remove windows-2019 from GitHub Actions workflow to prevent pipeline failures (#5241)

* Remove windows-2019 from GitHub Actions workflow test matrix

Co-authored-by: guhetier <[email protected]>

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Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: guhetier <[email protected]>

Author: Copilot

.github/workflows/test.yml

@@ -137,8 +137,6 @@ jobs:
           { config: "Release", plat: "linux", os: "ubuntu-24.04", arch: "x64", tls: "quictls", systemcrypto: "-UseSystemOpenSSLCrypto", build: "-Test"  },
           { config: "Release", plat: "linux", os: "ubuntu-24.04", arch: "x64", tls: "quictls", systemcrypto: "-UseSystemOpenSSLCrypto", build: "-Test", xdp: "-UseXdp"  },
           { config: "Debug", plat: "linux", os: "ubuntu-22.04", arch: "x64", tls: "openssl", sanitize: "-Sanitize", build: "-Test"  },
-          { config: "Debug", plat: "windows", os: "windows-2019", arch: "x64", tls: "quictls", build: "-Test" },
-          { config: "Debug", plat: "windows", os: "windows-2019", arch: "x64", tls: "openssl", build: "-Test" },
           { config: "Debug", plat: "windows", os: "windows-2022", arch: "x64", tls: "schannel", sanitize: "-Sanitize", build: "-Test" },
           { config: "Debug", plat: "windows", os: "windows-2022", arch: "x64", tls: "schannel", xdp: "-UseXdp", sanitize: "-Sanitize", build: "-Test" },
           { config: "Debug", plat: "windows", os: "windows-2022", arch: "x64", tls: "schannel", xdp: "-UseXdp", qtip: "-UseQtip", sanitize: "-Sanitize", build: "-Test" },