[jdk25u-dev] RFR: 8371967: Add Visual Studio 2026 to build toolchain for Windows

[Matthias Baesken]

8371967: Add Visual Studio 2026 to build toolchain for Windows

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Commit messages:
 - Backport dcba014ad56eae753c25c579fb30bb8ecfab69af

Changes: https://git.openjdk.org/jdk25u-dev/pull/111/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=111&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8371967
  Stats: 18 lines in 3 files changed: 15 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/111.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/111/head:pull/111

PR: https://git.openjdk.org/jdk25u-dev/pull/111