add module_dirs to salt ssh thin tarball

Fixes #45535

salt/client/ssh/__init__.py

@@ -914,6 +914,7 @@ class Single(object):
             opts_pkg['pillar_roots'] = self.opts['pillar_roots']
             opts_pkg['ext_pillar'] = self.opts['ext_pillar']
             opts_pkg['extension_modules'] = self.opts['extension_modules']
+            opts_pkg['module_dirs'] = self.opts['module_dirs']
             opts_pkg['_ssh_version'] = self.opts['_ssh_version']
             opts_pkg['__master_opts__'] = self.context['master_opts']
             if '_caller_cachedir' in self.opts:

salt/config/__init__.py

@@ -1486,6 +1486,7 @@ DEFAULT_MASTER_OPTS = {
     'keep_acl_in_token': False,
     'eauth_acl_module': '',
     'extension_modules': os.path.join(salt.syspaths.CACHE_DIR, 'master', 'extmods'),
+    'module_dirs': [],
     'file_recv': False,
     'file_recv_max_size': 100,
     'file_buffer_size': 1048576,