[SPARK-37730][PYTHON] Replace use of MPLPlot._add_legend_handle with …

…MPLPlot._append_legend_handles_labels

### What changes were proposed in this pull request?

Replace use of MPLPlot._add_legend_handle (removed in pandas) with MPLPlot._append_legend_handles_labels in histogram and KDE plots.
Based on:  pandas-dev/pandas@029907c

### Why are the changes needed?

Fix of SPARK-37730. plot.hist and plot.kde don't throw AttributeError for pandas=1.3.5.

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?

~~Tested with existing plot test on CI (for older pandas only).~~ (it seems that CI doesn't run matplotlib tests, see #35000 (comment))

I've run tests on a local computer, see #35000 (comment) :
```
$ python python/pyspark/pandas/tests/plot/test_series_plot_matplotlib.py
```

:question: **QUESTION:** Maybe add plot testing for pandas 1.3.5 on CI? (I've noticed that CI uses `pandas=1.3.4`, maybe update it to `1.3.5`?)

Closes #35000 from mslapek/fixpythonplot.

Authored-by: Michał Słapek <28485371+mslapek@users.noreply.github.com>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>
(cherry picked from commit 371e307)
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

python/pyspark/pandas/plot/matplotlib.py

@@ -392,6 +392,12 @@ def _make_plot(self):
             kwds = self.kwds.copy()
 
             label = pprint_thing(label if len(label) > 1 else label[0])
+            # `if hasattr(...)` makes plotting compatible with pandas < 1.3, see pandas-dev/pandas#40078.
+            label = (
+                self._mark_right_label(label, index=i)
+                if hasattr(self, "_mark_right_label")
+                else label
+            )
             kwds["label"] = label
 
             style, kwds = self._apply_style_colors(colors, kwds, i, label)
@@ -400,7 +406,10 @@ def _make_plot(self):
 
             kwds = self._make_plot_keywords(kwds, y)
             artists = self._plot(ax, y, column_num=i, stacking_id=stacking_id, **kwds)
-            self._add_legend_handle(artists[0], label, index=i)
+            # `if hasattr(...)` makes plotting compatible with pandas < 1.3, see pandas-dev/pandas#40078.
+            self._append_legend_handles_labels(artists[0], label) if hasattr(
+                self, "_append_legend_handles_labels"
+            ) else self._add_legend_handle(artists[0], label, index=i)
 
     @classmethod
     def _plot(cls, ax, y, style=None, bins=None, bottom=0, column_num=0, stacking_id=None, **kwds):
@@ -483,6 +492,12 @@ def _make_plot(self):
             kwds = self.kwds.copy()
 
             label = pprint_thing(label if len(label) > 1 else label[0])
+            # `if hasattr(...)` makes plotting compatible with pandas < 1.3, see pandas-dev/pandas#40078.
+            label = (
+                self._mark_right_label(label, index=i)
+                if hasattr(self, "_mark_right_label")
+                else label
+            )
             kwds["label"] = label
 
             style, kwds = self._apply_style_colors(colors, kwds, i, label)
@@ -491,7 +506,10 @@ def _make_plot(self):
 
             kwds = self._make_plot_keywords(kwds, y)
             artists = self._plot(ax, y, column_num=i, stacking_id=stacking_id, **kwds)
-            self._add_legend_handle(artists[0], label, index=i)
+            # `if hasattr(...)` makes plotting compatible with pandas < 1.3, see pandas-dev/pandas#40078.
+            self._append_legend_handles_labels(artists[0], label) if hasattr(
+                self, "_append_legend_handles_labels"
+            ) else self._add_legend_handle(artists[0], label, index=i)
 
     def _get_ind(self, y):
         return KdePlotBase.get_ind(y, self.ind)