GH-3315: Variant binary read does not take length into account #3333
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Rationale for this change
Extracting Binary value from Variant, creating the ByteBuffer doesn't consider the length of the Binary element, creating a ByteBuffer with the size of the remaining Variant byte[]
What changes are included in this PR?
Creating the Binary, configure the limit of ByteBuffer using the calculated length
Are these changes tested?
Yes, in a test that creates Variant with multiple Binary elements that have more content after them.
Are there any user-facing changes?
No
Closes #3315