fix(health): fix pyenv root and python exepath detect issue

Fix the following two issues:

- pyenv root detection issue

When `PYENV_ROOT` environment variable is not set, neovim will detect
pyenv's root via `pyenv root` command, but which will be always fail
because `vim.fn.system()` returns result with additional `\n`. Using
`vim.system` instead prevents this problem. to trim it before check
whether it is exists

- python executable path detection issue

Filter unrelated `python-config` in cases where multiple python versions
are installed, e.g. `python-config`, `python3.10-config`,
`python3.11-config` etc.

runtime/lua/vim/provider/health.lua

@@ -366,7 +366,17 @@ local function check_for_pyenv()
   local pyenv_root = vim.fn.resolve(os.getenv('PYENV_ROOT') or '')
 
   if pyenv_root == '' then
-    pyenv_root = vim.fn.system({ pyenv_path, 'root' })
+    local p = vim.system({ pyenv_path, 'root' }):wait()
+    if p.code ~= 0 then
+      local message = string.format(
+        'pyenv: Failed to infer the root of pyenv by running `%s root` : %s. Ignoring pyenv for all following checks.',
+        pyenv_path,
+        p.stderr
+      )
+      health.warn(message)
+      return { '', '' }
+    end
+    pyenv_root = vim.trim(p.stdout)
     health.info('pyenv: $PYENV_ROOT is not set. Infer from `pyenv root`.')
   end
 
@@ -754,7 +764,7 @@ local function python()
   local venv_bins = vim.fn.glob(string.format('%s/%s/python*', virtual_env, bin_dir), true, true)
   venv_bins = vim.tbl_filter(function(v)
     -- XXX: Remove irrelevant executables found in bin/.
-    return not v:match('python%-config')
+    return not v:match('python.*%-config')
   end, venv_bins)
   if vim.tbl_count(venv_bins) > 0 then
     for _, venv_bin in pairs(venv_bins) do