Fix compiler warning for misleading guarding in the tkinter (GH-26244) (GH-26252)

The newest gcc emmits this warning:

```
/Modules/_tkinter.c:272:9: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
  272 |         if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); tcl_tstate = tstate; }
      |         ^~
/Modules/_tkinter.c:2869:5: note: in expansion of macro ‘LEAVE_PYTHON’
 2869 |     LEAVE_PYTHON
      |     ^~~~~~~~~~~~
/Modules/_tkinter.c:243:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
  243 |     (*(PyThreadState**)Tcl_GetThreadData(&state_key, sizeof(PyThreadState*)))
      |     ^
/Modules/_tkinter.c:272:57: note: in expansion of macro ‘tcl_tstate’
  272 |         if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); tcl_tstate = tstate; }
      |                                                         ^~~~~~~~~~
/Modules/_tkinter.c:2869:5: note: in expansion of macro ‘LEAVE_PYTHON’
 2869 |     LEAVE_PYTHON

```

that's because the macro packs together two statements at the same level
as the "if". The warning is misleading but is very noisy so it makes
sense to fix it.
(cherry picked from commit 95d0471)

Co-authored-by: Pablo Galindo <[email protected]>

Co-authored-by: Pablo Galindo <[email protected]>

Author: miss-islington

Modules/_tkinter.c

@@ -246,12 +246,15 @@ static PyThreadState *tcl_tstate = NULL;
 #endif
 
 #define ENTER_TCL \
-    { PyThreadState *tstate = PyThreadState_Get(); Py_BEGIN_ALLOW_THREADS \
-        if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); tcl_tstate = tstate;
+    { PyThreadState *tstate = PyThreadState_Get(); \
+      Py_BEGIN_ALLOW_THREADS \
+      if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); \
+      tcl_tstate = tstate;
 
 #define LEAVE_TCL \
     tcl_tstate = NULL; \
-    if(tcl_lock)PyThread_release_lock(tcl_lock); Py_END_ALLOW_THREADS}
+    if(tcl_lock)PyThread_release_lock(tcl_lock); \
+    Py_END_ALLOW_THREADS}
 
 #define ENTER_OVERLAP \
     Py_END_ALLOW_THREADS
@@ -261,12 +264,14 @@ static PyThreadState *tcl_tstate = NULL;
 
 #define ENTER_PYTHON \
     { PyThreadState *tstate = tcl_tstate; tcl_tstate = NULL; \
-        if(tcl_lock) \
-          PyThread_release_lock(tcl_lock); PyEval_RestoreThread((tstate)); }
+      if(tcl_lock) \
+        PyThread_release_lock(tcl_lock); \
+      PyEval_RestoreThread((tstate)); }
 
 #define LEAVE_PYTHON \
     { PyThreadState *tstate = PyEval_SaveThread(); \
-        if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); tcl_tstate = tstate; }
+      if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); \
+      tcl_tstate = tstate; }
 
 #define CHECK_TCL_APPARTMENT \
     if (((TkappObject *)self)->threaded && \