[jdk8u-dev] RFR: 8358538: Update GHA Windows runner to 2025

[Antonio Vieiro]

Backport of [JDK-8358538](https://bugs.openjdk.org/browse/JDK-8358538) from JDK11 that uses the new `windows-2025` GHA runner, that is replacing the old `windows-2019` GHA runner since 2025-06-30. The backport is not clean, since the GHA configuration is completely different from JDK11.

JDK8 still builds with Visual Studio 2017, so there's no need to backport [JDK-8360042](https://bugs.openjdk.org/browse/JDK-8360042), nor to change any other setting.

Build should be clean, but for the `jdk_security_infra` test failures, that are well known to fail in JDK8 (as they should in JDK11), and are unrelated.

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Commit messages:
 - Backport 0927ca70e66ef27b38cbf5c0dd2851c796218067

Changes: https://git.openjdk.org/jdk8u-dev/pull/665/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=665&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8358538
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/665.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/665/head:pull/665

PR: https://git.openjdk.org/jdk8u-dev/pull/665