Fix --configpath not load

[Mc-GrowlR]

Info

Follow-up on my issue #3008 .Screenshots of some of the effects can also be found in the issue.
This commit is intended to fix a bug where exporting a document via the command line could not read the configuration file specified with the '--configpath' option.

ENV

.luarc.json file

from: #2997
.luarc.doc.json

command

./bin/lua-language-server.exe --configpath ./.luarc.doc.json --doc ./test/main.lua --doc_out_path ./test/

test lua file

M = {}

result

output json doc file:

doc.json

Add the terminal output of the print statement

root uri        file:///e%3A/luals/old/test/main.lua
Config All Path:        E:/luals/old/.luarc.doc.json
configName:     .luarc.doc.json
parent: E:/luals/old
------
uri type:       string  file:///e%3A/luals/old
CONFIGPATH      ./.luarc.doc.json
aaa     .luarc.doc.json

==================
loadLocalConfig Test Begins
folderPath      E:\luals\old
after :         E:\luals\old\.luarc.doc.json
loadLocalConfig Test end
 ================

path:   E:\luals\old\.luarc.doc.json
 buf    string  {
  "$schema": "https://raw.githubusercontent.com/sumneko/vscode-lua/master/setting/schema.json",
  "runtime.version": "Lua 5.1",
  "runtime.builtin": {
    "basic": "disable",
    "bit": "disable",
    "bit32": "disable",
    "builtin": "disable",
    "coroutine": "disable",
    "debug": "disable",
    "ffi": "disable",
    "io": "disable",
    "jit": "disable",
    "math": "disable",
    "os": "disable",
    "package": "disable",
    "string": "disable",
    "table": "disable",
    "table.clear": "disable",
    "table.new": "disable",
    "utf8": "disable"
  }
}
Documentation exported:

test\doc.json
test\doc.md

Postscript

I believe that with the fix of this bug, you can use the document export function, no need to make changes to the source code, and only need the configuration file to filter out the standard libraries in the environment.
If I can help you, then my work is meaningful.