AVRO-4222: [C++] Support writer to specify compression level

[wgtmac]

What is the purpose of the change

• Add support to specify compression level to the C++ writer.
• Make all codec enums visible and add runtime availability check.

Verifying this change

• Extended test/DataFileTests.cc to test compression levels.

Documentation

• Does this pull request introduce a new feature? yes
• If yes, how is the feature documented? not applicable

[wgtmac]

Could you please take a look? @thiru-mg @martin-g

[thiru-mg]

Looks good to me.
But we can localize all code-specific functionality (stringification, validation, etc.) into a common place by having codec_traits (or other means) and avoid switch statements at multiple places. Another advantage is that if a new codec is added in the future, it forces the developer to think in a structured way.

[martin-g]

nit: This seems to be an old issue: fileOutputStream(filename) creates/truncates the output file before running the validation checks in init(), i.e. an invalid codec/compression_level/syncInterval will lead to an exception but the output file will be already created.

[wgtmac]

I agree that this is an issue. Another constructor DataFileWriter(std::unique_ptr<OutputStream> outputStream, ...) also have the same issue. However, this is a separate issue and fixing it may complicate this PR.

[wgtmac]

@thiru-mg @martin-g Thanks for your review! Not sure if the latest change is what you want. Let me know what you think :)