[SPARK-30205][PYSPARK] Import ABCs from collections.abc to remove deprecation warnings

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

This PR aims to remove deprecation warnings by importing ABCs from `collections.abc` instead of `collections`.
- python/cpython#10596

### Why are the changes needed?

This will remove deprecation warnings in Python 3.7 and 3.8.

```
$ python -V
Python 3.7.5

$ python python/pyspark/resultiterable.py
python/pyspark/resultiterable.py:23: DeprecationWarning:
Using or importing the ABCs from 'collections' instead of from 'collections.abc'
is deprecated since Python 3.3,and in 3.9 it will stop working
  class ResultIterable(collections.Iterable):
```

### Does this PR introduce any user-facing change?

No, this doesn't introduce user-facing change

### How was this patch tested?

Manually because this is about deprecation warning messages.

Closes #26835 from tirkarthi/spark-30205-fix-abc-warnings.

Authored-by: Karthikeyan Singaravelan <tir.karthi@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

Author: tirkarthi

python/pyspark/resultiterable.py

@@ -15,12 +15,16 @@
 # limitations under the License.
 #
 
-import collections
+try:
+    from collections.abc import Iterable
+except ImportError:
+    from collections import Iterable
+
 
 __all__ = ["ResultIterable"]
 
 
-class ResultIterable(collections.Iterable):
+class ResultIterable(Iterable):
 
     """
     A special result iterable. This is used because the standard