Mason crashes Neovim with bad argument to fs_fstat

Nobody has claimed this yet.

### I've searched open issues for similar requests

- [X] Yes

### I've recently downloaded the latest plugin version of mason.nvim

- [X] Yes

### Problem description

Using Mason command causes neovim to crash with error:

```
PANIC: unprotected error in call to Lua API (...ocal/share/nvim/plugged/mason.nvim/lua/mason-core/fs.lua:13: bad argument #1 to'fs_fstat' (number expected, got nil))
```

### Expected behavior

neovim does not crash when using Mason commands

### Steps to reproduce

On Wolfi OS with the following packages installed:

```
luajit (2.1_p20210510-r7)
lua5.1-lpeg (1.1.0-r1)
libuv (1.49.2-r0)
lua-luv (1.48.0.2-r2)
msgpack-c (6.1.0-r1)
tree-sitter (0.24.3-r0)
unibilium (2.1.2-r0)
neovim (0.10.2-r0)
```

init.vim (using plug.vim):

```vimrc
call plug#begin()
Plug 'williamboman/mason.nvim'
call plug#end()

lua << EOF
require("mason").setup()
EOF
```

1. install nvim, plug.vim, `:PlugInstall`
2. run `:Mason` command

### Neovim version (>= 0.7)

NVIM v0.10.2
Build type: RelWithDebInfo
LuaJIT 2.1.0-beta3

### Operating system/version

Linux 78e974240061 6.10.12-200.fc40.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Sep 30 21:38:25 UTC 2024 x86_64 Linux

### Healthcheck output

running `:checkhealth` returns this same error:

```
PANIC: unprotected error in call to Lua API (...ocal/share/nvim/plugged/mason.nvim/lua/mason-core/fs.lua:13: bad argument #1 to'fs_fstat' (number expected, got nil))
```

### Screenshots

_No response_

Start by reproducing the crash with the listed Wolfi OS, Neovim 0.10.2, and Mason setup, then inspect lua/mason-core/fs.lua at line 13 and the fs_fstat call. Verify the fix by running :Mason and :checkhealth without a Neovim crash.

Written by the indexing model from the issue text.