fix frequent refresh of available profiles

[meganrogge]

This PR fixes #136509

[meganrogge]

to test, have this as your settings:

{
    "terminal.integrated.profiles.windows": {
        "PowerShell": {
            "source": "PowerShell",
            "icon": "terminal-powershell",
            "args": [
                "powershell -NoLogo -NoExit -ExecutionPolicy ByPass -Command ${env:USERPROFILE}\\Miniconda3\\shell\\condabin\\conda-hook.ps1"
            ]
        },
    },
    "terminal.integrated.defaultProfile.windows": "PowerShell"
}

go to the settings UI and try to add an item to files/exclude - every 2 seconds it will shut that input box.