[SPARK-49574][CONNECT][SQL] ExpressionEncoder tracks the AgnosticEncoder that created it #48062
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What changes were proposed in this pull request?
This PR makes ExpressionEncoder track the AgnosticEncoder it is created from. The main reason for this change is to allow for situations where both Agnostic and ExpressionEncoders are used together.
Why are the changes needed?
This is the first step in creating an shared Encoders object for Classic and Connect.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Existing tests.
Was this patch authored or co-authored using generative AI tooling?
No.