[SPARK-55403][PS] Fix no attribute 'draw' error in the plot tests with pandas 3

[ueshin]

What changes were proposed in this pull request?

Fixes no attribute 'draw' error in the plot tests with pandas 3.

Why are the changes needed?

The plot tests fail with the following error working with pandas 3:

Traceback (most recent call last):
...
  File "/.../python/pyspark/pandas/plot/matplotlib.py", line 971, in _plot
    plot_obj.draw()
    ^^^^^^^^^^^^^
AttributeError: 'PandasOnSparkAreaPlot' object has no attribute 'draw'

Does this PR introduce any user-facing change?

No.

How was this patch tested?

The existing tests should pass.

Was this patch authored or co-authored using generative AI tooling?

No.

[github-actions]

JIRA Issue Information

=== Sub-task SPARK-55403 ===
Summary: Fix no attribute 'draw' error in the plot tests with pandas 3
Assignee: None
Status: Open
Affected: ["4.2.0"]

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[ueshin]

cc @gaogaotiantian @HyukjinKwon @zhengruifeng