fix(testables): default to termopen test executor if not using neotest

lua/rustaceanvim/config/internal.lua

@@ -66,22 +66,13 @@ local function load_dap_configuration(type)
   return dap_config
 end
 
----@return RustaceanExecutor
-local function get_crate_test_executor()
-  if vim.fn.has('nvim-0.10.0') == 1 then
-    return executors.background
-  else
-    return executors.termopen
-  end
-end
-
 ---@return RustaceanExecutor
 local function get_test_executor()
   if package.loaded['rustaceanvim.neotest'] ~= nil then
     -- neotest has been set up with rustaceanvim as an adapter
     return executors.neotest
   end
-  return get_crate_test_executor()
+  return executors.termopen
 end
 
 ---@class RustaceanConfig
@@ -98,7 +89,7 @@ local RustaceanDefaultConfig = {
     test_executor = get_test_executor(),
 
     ---@type RustaceanExecutor
-    crate_test_executor = get_crate_test_executor(),
+    crate_test_executor = executors.termopen,
 
     ---@type string | nil
     cargo_override = nil,