gh-54781: Move Lib/tkinter/test/test_ttk/ to Lib/test/test_ttk/ (#94070)

* Move Lib/tkinter/test/test_tkinter/ to Lib/test/test_tkinter/.
* Move Lib/tkinter/test/test_ttk/ to Lib/test/test_ttk/.
* Add Lib/test/test_ttk/__init__.py based on test_ttk_guionly.py.
* Add Lib/test/test_tkinter/__init__.py
* Remove old Lib/test/test_tk.py.
* Remove old Lib/test/test_ttk_guionly.py.
* Add __main__ sub-modules.
* Update imports and update references to rename files.

Lib/test/test_tkinter/test_text.py

@@ -0,0 +1,45 @@
+import unittest
+import tkinter
+from test.support import requires
+from test.test_tkinter.support import AbstractTkTest
+
+requires('gui')
+
+class TextTest(AbstractTkTest, unittest.TestCase):
+
+    def setUp(self):
+        super().setUp()
+        self.text = tkinter.Text(self.root)
+
+    def test_debug(self):
+        text = self.text
+        olddebug = text.debug()
+        try:
+            text.debug(0)
+            self.assertEqual(text.debug(), 0)
+            text.debug(1)
+            self.assertEqual(text.debug(), 1)
+        finally:
+            text.debug(olddebug)
+            self.assertEqual(text.debug(), olddebug)
+
+    def test_search(self):
+        text = self.text
+
+        # pattern and index are obligatory arguments.
+        self.assertRaises(tkinter.TclError, text.search, None, '1.0')
+        self.assertRaises(tkinter.TclError, text.search, 'a', None)
+        self.assertRaises(tkinter.TclError, text.search, None, None)
+
+        # Invalid text index.
+        self.assertRaises(tkinter.TclError, text.search, '', 0)
+
+        # Check if we are getting the indices as strings -- you are likely
+        # to get Tcl_Obj under Tk 8.5 if Tkinter doesn't convert it.
+        text.insert('1.0', 'hi-test')
+        self.assertEqual(text.search('-test', '1.0', 'end'), '1.2')
+        self.assertEqual(text.search('test', '1.0', 'end'), '1.3')
+
+
+if __name__ == "__main__":
+    unittest.main()