new input verification of configurations.intelliSenseMode fails to verify msvc-x{86|64} if configurations.compilerPath contains a variable

[mistersandman]

Type: LanguageService

Describe the bug

• OS and Version: Windows (any version)
• VS Code Version: any
• C/C++ Extension Version: 0.25.0
• Other extensions you installed (and if the issue persists after disabling them): none
• A clear and concise description of what the bug is.

To Reproduce
Example configuration in c_cpp_properties.json triggering the issue:

{
    "env": {
        "vc.path": "<path_to_your_msvc_installation>",
        ...
    },
    "configurations": [
        {
            ...,
            "compilerPath": "${vc.path}\\bin\\HostX64\\x64\\cl.exe",
            "intelliSenseMode": "msvc-x64",
            ...
        }
    ]
}

Problems reported for the above configuration: intelliSenseMode msvc-x64 is incompatible with compilerPath.

Expected behavior
No problems reported, as the expanded compilerPath is a valid compiler for msvc-x64 mode.

Additional context
In function isCompilerIntelliSenseModeCompatible, util.extractCompilerPathAndArgs is called with the unexpanded compiler path, which only expects expanded paths.

vscode-cpptools/Extension/src/LanguageServer/configurations.ts

Line 406 in 3251ee5

let compilerPathAndArgs: util.CompilerPathAndArgs = util.extractCompilerPathAndArgs(configuration.compilerPath);

[sean-mcmanus]

The fix is available in 0.25.1 now.