[SPARK-35599][PYTHON] Adjust check_exact parameter for older pd.testing

[xinrong-meng]

What changes were proposed in this pull request?

Adjust the check_exact parameter for non-numeric columns to ensure pandas-on-Spark tests passed with all pandas versions.

Why are the changes needed?

pd.testing utils are utilized in pandas-on-Spark tests.
Due to pandas-dev/pandas#35446, check_exact=True for non-numeric columns doesn't work for older pd.testing utils, e.g. assert_series_equal. We wanted to adjust that to ensure pandas-on-Spark tests pass for all pandas versions.

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Existing unit tests.

Keyword: SPARK-35337

[SparkQA]

Test build #139298 has finished for PR 32772 at commit 787b3ac.

• This patch fails PySpark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/43821/

[SparkQA]

Kubernetes integration test status success
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/43821/

[SparkQA]

Test build #139358 has finished for PR 32772 at commit d3f44f0.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/43880/

[SparkQA]

Kubernetes integration test status success
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/43880/

[ueshin]

LGTM.

[xinrong-meng]

Doc builds failed. I will rebase and retest.

[SparkQA]

Test build #139362 has finished for PR 32772 at commit 59ad0a7.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Kubernetes integration test unable to build dist.

exiting with code: 1
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/43884/

[HyukjinKwon]

Merged to master.