fix: Error code 5 with golangci-lint v2

[stefanbildl]

I had the same problems with exit code 5 using golangci-lint version 2 as mentioned in #744.

The comment by @brunofjesus #744 (comment) helped me solve part of the issue.

I added code that goes up the directory tree to find the go mod file.
Also I added /... to the end of the path to handle some weird cases where golangci-lint still complained.

This seems to fix the issue with error code 5 for me. The problem with exit code 7 is still unresolved

[stefanbildl]

related to #761

[mzeiher]

Hi, as an alternative I came up with for this error is keeping the arguments and just changing the current working dir. This fixes the issues in our monorepo...

local getCwd = function()
  local current = vim.fn.fnamemodify(vim.api.nvim_buf_get_name(0), ":h")
  local found = vim.fs.find("go.mod", {
    upward = true,
    path = current,
  })
  return #found > 0 and vim.fn.fnamemodify(found[1], ":h") or vim.fn.getcwd()
end

return {
  cmd = "golangci-lint",
  append_fname = false,
  args = getArgs(),
  stream = "stdout",
  cwd = getCwd(),
...

just fyi...