feat: add support for url_encode, url_decode, and try_url_decode

[parthchandra]

Which issue does this PR close?

Closes #4155

Rationale for this change

try_url_decode was returning incorrect results

What changes are included in this PR?

• Add native support for url_encode, url_decode, and try_url_decode (Spark 4.0+) by wiring up the existing datafusion-spark UDFs and handling the StaticInvoke serde for UrlCodec.encode / UrlCodec.decode.
  • Fix url_decode: try_url_decode (Spark 4.0) errors instead of returning NULL on malformed input #4155: try_url_decode was silently dropping the failOnError=false flag, causing Comet to error on malformed input where Spark returns NULL.

How are these changes tested?

SQL file tests -
expressions/url/url_decode.sql — valid inputs, malformed input errors
expressions/url/url_encode.sql — valid inputs, multibyte UTF-8
expressions/url/try_url_decode.sql — same inputs as url_decode, malformed input returns NULL

[andygrove]

Thanks @parthchandra, could you add the tests that I was adding in #4152 ? They covered some edge cases

[parthchandra]

Thanks @parthchandra, could you add the tests that I was adding in #4152 ? They covered some edge cases

Sure. Do we want to add parse_url to this PR as well?

[andygrove]

I don't mind either way. We can do that as separate PR if easier