[SPARK-46754][SQL][AVRO] Fix compression code resolution in avro table definition and write options #44780
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What changes were proposed in this pull request?
This PR fixes the case sensitivity of 'compression' in the avro table definition and the write options, in order to make it consistent with other file sources. Also, the current logic for dealing invalid codec names is unreachable.
Why are the changes needed?
bugfix
Does this PR introduce any user-facing change?
yes, 'compression'='Xz', 'compression'='XZ' now works as well as 'compression'='xz'
How was this patch tested?
new tests
Was this patch authored or co-authored using generative AI tooling?
no