refactor(frontend): disallow creating new avro sources without schema registry

[xiangjinwu]

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What's changed and what's your intention?

The current implementation is far from best practice. #12871 Effectively we shall consider it as not supported at all.

Existing sources continue working (in the undesired way). And it is easy to recover the code path in case someone relies on it or we support it in another way later.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added test labels as necessary. See details.
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

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Documentation

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Release note

Creating sources/table with avro encoding now requires usage of schema registry. The avro definition can no longer come from http[s]:///s3:///file://. The schema.location option shall not be used.

Do NOT document or suggest usage of the option with_deprecated_file_header. It is purely internal to keep the current implementation longer and ease the revert (just in case). If a legit production use case does arise, we shall reimplement it in a more future proof way, for example metadata_preceding_payload = [file | single | confluent_schema_registry | aws_glue_schema_registry | none | fixed_size].

[tabVersion]

I support forbidding this behavior before it goes too far.

[fuyufjh]

+1 for removing this function