[SPARK-50582][PYTHON][FOLLOW-UP] Add quote to functions __all__

### What changes were proposed in this pull request?
Add `quote` to functions `__all__`

### Why are the changes needed?
so that it will be imported by wildcard import

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

### How was this patch tested?
updated test

### Was this patch authored or co-authored using generative AI tooling?
no

Closes #50671 from zhengruifeng/add_quote.

Authored-by: Ruifeng Zheng <ruifengz@apache.org>
Signed-off-by: Ruifeng Zheng <ruifengz@apache.org>

Author: zhengruifeng

python/pyspark/sql/functions/__init__.py

@@ -153,6 +153,7 @@
     "overlay",
     "position",
     "printf",
+    "quote",
     "randstr",
     "regexp_count",
     "regexp_extract",

python/pyspark/sql/tests/test_functions.py

@@ -112,7 +112,6 @@ def test_wildcard_import(self):
             "approxCountDistinct",  # deprecated
             "bitwiseNOT",  # deprecated
             "countDistinct",  # deprecated
-            "quote",  # new function in 4.1
             "shiftLeft",  # deprecated
             "shiftRight",  # deprecated
             "shiftRightUnsigned",  # deprecated