[SPARK-37326][SQL][FOLLOW-UP] Update code and tests for TimestampNTZ support in CSV data source

[sadikovi]

What changes were proposed in this pull request?

This is a follow-up PR to #34596. There were a few comments and suggestions raised after the PR was merged, so I addressed them in this follow-up:

• Instead of using failOnError, which was confusing as no error was thrown in the method, we use allowTimeZone which has an opposite meaning of failOnError and far more descriptive.
• I updated a few test names to resolve ambiguity.
• I changed the tests to use withTempPath as was suggested in the original PR.

Why are the changes needed?

Code cleanup and clarifications.

Does this PR introduce any user-facing change?

No

How was this patch tested?

Existing unit and integration tests.

[sadikovi]

cc @MaxGekk @cloud-fan @gengliangwang for review. Thanks!

[SparkQA]

Kubernetes integration test starting
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/50315/

[SparkQA]

Kubernetes integration test status failure
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/50315/

[cloud-fan]

thanks, merging to master!

[SparkQA]

Test build #145840 has finished for PR 34777 at commit 65cdaa5.

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