Fix extended tests on main to get CI green (#18096)

## Which issue does this PR close?


- Closes #18084

## Rationale for this change
Some of the extended tests are failing because we have fixed case
conditional evaluation and queries that (incorrectly) previously did not
pass are now.

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## What changes are included in this PR?

Update datafusion-testing pin

## Are these changes tested?

I tested locally with:

```shell
INCLUDE_SQLITE=true cargo test --profile release-nonlto --test sqllogictests
```

## Are there any user-facing changes?

No

Author: alamb