Implement interleave_columns for structs columns

[ttnghia]

This PR adds support for structs column in the interleave_column API. In addition, it also does a simple refactor of the existing overload functions with a new style of SFINAE implementation.
Closes #8927.

[ttnghia]

@andygrove Please test this with your test cases in Spark. Thanks.

[rgsl888prabhu]

Had a question, does this support struct with nesting level more than 1? like Struct{Struct{Struct}}, adding a test case to cover that scenario would be helpful.

Rest looks good.

[ttnghia]

Had a question, does this support struct with nesting level more than 1? like Struct{Struct{Struct}}, adding a test case to cover that scenario would be helpful.

Rest looks good.

Thanks for the recommendation. Nested structs should be supported, as the interleaving process is called recursively on the children columns. I have added a test for this (2 nested levels should be enough for verifying this case).

[ttnghia]

Rerun tests.

[codecov]

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[ttnghia]

@gpucibot merge