Use DOTNET_CLI_HOME for finding fantomas as global tool (Fixes #3104)

[MikaelUmaN]

See issue: #3104

DOTNET_CLI_HOME can be used to specify alternate locations of global tools rather than the user's home directory.

See: https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-environment-variables

Tested using local script:

fsharp

#r "artifacts/bin/Fantomas.Client/release/Fantomas.Client.dll"
#r "nuget: SemanticVersioning"
#r "nuget: StreamJsonRpc"

open System
open Fantomas.Client
open Fantomas.Client.FantomasToolLocator
open Fantomas.Client.LSPFantomasServiceTypes

Environment.CurrentDirectory <- "/home/jovyan"
let cwd = Environment.CurrentDirectory
let cwdFolder = Fantomas.Client.LSPFantomasServiceTypes.Folder cwd

let fantomasToolResult: Result<FantomasToolFound, FantomasToolError> =
    findFantomasTool cwdFolder


let toolInfo = 
    match fantomasToolResult with
    | Ok (FantomasToolFound (version, toolInfo)) -> toolInfo
    | Error error ->
        // Handle the error case
        failwithf "Error: %A" error

let cfRes = createFor toolInfo

with DOTNET_CLI_HOME set to /opt/dotnet

[nojaf]

Thanks!