[BUG] Remove inaccessible and unused class AccessibleArrowColumnVector

[tgravescs]

Describe the bug
This came up because of a question - #11862
The AccessibleArrowColumnVector was originally added for a customer who was going to write their own DataSource V2. That customer is not using it and after looking, this class is not accessible due to the shimming and parallel world stuff. We should just remove the class.

Originally added in #1622

Steps/Code to reproduce bug
Please provide a list of steps or a code sample to reproduce the issue.
Avoid posting private or sensitive data.

Expected behavior
A clear and concise description of what you expected to happen.

Environment details (please complete the following information)

• Environment location: [Standalone, YARN, Kubernetes, Cloud(specify cloud provider)]
• Spark configuration settings related to the issue

Additional context
Add any other context about the problem here.