[Python] Memory leak for repeated StructArray creation

[rjzamora]

Describe the bug, including details regarding any error messages, version, and platform.

Memory grows continuously when a simple StructArray is overwritten repeatedly:

import pyarrow as pa

while True:
    arr = pa.array([{"test": {str(i): "test" * 100000 for i in range(50)}}])

Component(s)

Python

[galipremsagar]

I noticed pa.StructArray.from_arrays doesn't seem to be having this leak.

[wence-]

Duplicate of #37989, fixed in #40412

[rjzamora]

Excellent - Thanks for the link @wence- !