CLN: avoid internals in tz_convert, tz_localize (#33085)

Author: jbrockmendel

pandas/core/generic.py

@@ -9244,7 +9244,7 @@ def _tz_convert(ax, tz):
                 raise ValueError(f"The level {level} is not valid")
             ax = _tz_convert(ax, tz)
 
-        result = self._constructor(self._data, copy=copy)
+        result = self.copy(deep=copy)
         result = result.set_axis(ax, axis=axis, inplace=False)
         return result.__finalize__(self)
 
@@ -9413,7 +9413,7 @@ def _tz_localize(ax, tz, ambiguous, nonexistent):
                 raise ValueError(f"The level {level} is not valid")
             ax = _tz_localize(ax, tz, ambiguous, nonexistent)
 
-        result = self._constructor(self._data, copy=copy)
+        result = self.copy(deep=copy)
         result = result.set_axis(ax, axis=axis, inplace=False)
         return result.__finalize__(self)