Enable detection cmake script for Visual Studio 2026 and pre-release versions of Visual Studio (#14160)

* Updating to support VS2026 and insiders builds

* Updated max ver (exclusive) to 19.0

* Fix command for vswhere to include prerelease

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Co-authored-by: Ben Hillis <benhillis@gmail.com>

Author: andysterland

CMakeLists.txt

@@ -262,7 +262,7 @@ endif()
 # N.B. The version is set to VS2022 to ensure local runs match pipeline behavior
 # Require that Clang be installed in the product to potentially de-deduplicate
 execute_process(
-    COMMAND "${VSWHERE_SOURCE_DIR}/vswhere.exe" -version "[17.0,18.0)" -products * -requires Microsoft.VisualStudio.Component.VC.Llvm.Clang -property installationPath
+    COMMAND "${VSWHERE_SOURCE_DIR}/vswhere.exe" -version "[17.0,19.0)" -products * -requires Microsoft.VisualStudio.Component.VC.Llvm.Clang -property installationPath -prerelease
     OUTPUT_VARIABLE VS_INSTALL_DIR
     OUTPUT_STRIP_TRAILING_WHITESPACE
     COMMAND_ERROR_IS_FATAL ANY