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

A follow-up of the backport (#55718) to fix the test - SPARK-55372 (4.2.0) changed the output of `SHOW CREATE TABLE ...` output for `STRING` columns, it does not go to branch-4.1, so the test case should be modified.

### Why are the changes needed?

Fix tests.

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

No.

### How was this patch tested?

```
$ build/sbt "sql/testOnly *ShowCreateTableSuite"
[info] Run completed in 11 seconds, 832 milliseconds.
[info] Total number of tests run: 46
[info] Suites: completed 2, aborted 0
[info] Tests: succeeded 46, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[success] Total time: 304 s (0:05:04.0), completed May 9, 2026, 5:36:26 PM
```

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #55780 from pan3793/SPARK-56755-4.1.

Authored-by: Cheng Pan <pan3793@gmail.com>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>

Port #55780 to branch-4.0

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

A follow-up of the backport (#55718) to fix the test - SPARK-55372 (4.2.0) changed the output of `SHOW CREATE TABLE ...` output for `STRING` columns, it does not go to branch-4.1/branch-4.0, so the test case should be modified.

### Why are the changes needed?

Fix tests.

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

No.

### How was this patch tested?

```
$ build/sbt "sql/testOnly *ShowCreateTableSuite"
[info] Run completed in 11 seconds, 832 milliseconds.
[info] Total number of tests run: 46
[info] Suites: completed 2, aborted 0
[info] Tests: succeeded 46, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[success] Total time: 304 s (0:05:04.0), completed May 9, 2026, 5:36:26 PM
```

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #55791 from pan3793/SPARK-56755-followup-4.0.

Authored-by: Cheng Pan <pan3793@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>