zstd compression: stop using the streaming feature

[daipom]

Is your feature request related to a problem? Please describe.

The streaming feature (Zstd::StreamWriter and Zstd::StreamReader) of zstd-ruby is experimental.

• https://github.com/SpringMT/zstd-ruby?tab=readme-ov-file#stream-writer-and-reader-wrapper

Actually, there was a bug.
Although the critical bug has been resolved, some strange behavior is still being reported.

• Streaming compression and decompression corruption SpringMT/zstd-ruby#112
• Streaming compression and decompression corruption SpringMT/zstd-ruby#112 (comment)

We considered that we may not need to use the streaming feature.

• compressable: Handle zstd frames correctly #5094 (comment)

It would be better to stop using the streaming feature if it is unnecessary.

Describe the solution you'd like

#5094 (comment)

Describe alternatives you've considered

None.

Additional context

No response