[BEAM-12680] Calcite SqlTransform no longer experimental

[apilloud]

Dropping experimental (and SuppressWarnings). Pending discussion on dev@.

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ValidatesRunner compliance status (on master branch)

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---					---
Java
Python	---					---
XLang						---

Examples testing status on various runners

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---	---	---	---	---	---	---
Java	---		---	---	---	---	---
Python	---	---	---	---	---	---	---
XLang	---	---	---	---	---	---	---

Post-Commit SDK/Transform Integration Tests Status (on master branch)

Go	Java	Python

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website	Whitespace	Typescript
Non-portable
Portable	---			---	---	---

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GitHub Actions Tests Status (on master branch)

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[apilloud]

Run Java_Examples_Dataflow PreCommit

[ibzib]

I wonder if we should keep some of the UDF methods experimental. There are currently three registerUdf methods and we might introduce a fourth eventually for ScalarFn. And registerUdaf has always been a little sketchy since SQL UDAFs ignore many of the methods of CombineFn.

Otherwise LGTM.

[apilloud]

Run Java_Examples_Dataflow PreCommit

[apilloud]

Updated to mark UDF methods as experimental.

[ibzib]

LGTM

[apilloud]

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[apilloud]

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[apilloud]

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[apilloud]

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[apilloud]

Run Java_Examples_Dataflow PreCommit

[apilloud]

Run Java_Examples_Dataflow_Java11 PreCommit

[apilloud]

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[apilloud]

Run Java_Examples_Dataflow_Java11 PreCommit

[apilloud]

I'm going to hold off on merging this until #14729 goes in. (We also need to figure out what is wrong with Java_Examples_Dataflow, but that isn't this PR.)

[apilloud]

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[apilloud]

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