Better GPU Cast type checks

[revans2]

This automates generating the docs for cast. It also updates the tests in cast so that they go off of the types listed as supported.

I did take one of the changes from #1396 to make this work (Thanks @andygrove for that work)

[revans2]

build

[github-actions]

👎 Promotion blocked, new vulnerability found

Vulnerability report

Component	Vulnerability	Description	Severity
Guava: Google Core Libraries for Java	CVE-2020-8908	A temp directory creation vulnerability exist in Guava versions prior to 30.0 allowing an attacker with access to the machine to potentially access data in a temporary directory created by the Guava com.google.common.io.Files.createTempDir(). The permissions granted to the directory created default to the standard unix-like /tmp ones, leaving the files open. We recommend updating Guava to version 30.0 or later, or update to Java 7 or later, or to explicitly change the permissions after the creation of the directory if neither are possible.	LOW

[andygrove]

It looks like the only time we are excluding these values from the test is when ansiEnabled=true rather than excluding them for particular Spark versions?

[revans2]

Yes, version 3.1 + when ANSI is enabled they now cause an exception to be thrown. Because the test this is for is "Test all supported casts with in-range values" I assumed that is fine. If you want me to allow different values for different versions I can.

[andygrove]

I think this change is good but the comment confused me so I just wanted to make sure that I understood this correctly.

[revans2]

I'll update the comment to explain what is happening.

[pxLi]

build