Improve lua configuration and test files

Change lua test files to call `require 'lldebugger'` only when using
love, because it's not needed with lua or luajit. Also add `stopOnEntry`
key to test `.vimspector.json` because it works correctly with this
change.

support/test/lua/simple/.vimspector.json

@@ -9,7 +9,8 @@
         "cwd": "${workspaceFolder}",
         "program": {
           "lua": "lua",
-          "file": "simple.lua"
+          "file": "simple.lua",
+          "stopOnEntry": false
         }
       }
     },
@@ -21,7 +22,8 @@
         "cwd": "${workspaceFolder}",
         "program": {
           "lua": "luajit",
-          "file": "simple.lua"
+          "file": "simple.lua",
+          "stopOnEntry": false
         }
       }
     }

support/test/lua/simple/simple.lua

@@ -1,7 +1,3 @@
-if pcall(require, 'lldebugger') then
-  require('lldebugger').start()
-end
-
 local separator = ' '