improve "Data type mismatch" error message

[AlJohri]

Currently the error message doesn't give enough information to debug what's going on.

arrow2-convert/arrow2_convert/src/deserialize.rs

Lines 305 to 307 in 6c37e29

	Err(arrow2::error::Error::InvalidArgumentError(
	"Data type mismatch".to_string(),
	))

Something like this helped me debug an issue I was running into:

Err(arrow2::error::Error::InvalidArgumentError(format!(
    "Data type mismatch. Expected: {:?} | Found: {:?}",
    &<ArrowType as ArrowField>::data_type(),
    arr.data_type()
)))

It produced an error message that looks like:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: InvalidArgumentError("Data type mismatch. Expected: Struct([...redacted...]) | Found: Struct(...redacted...)")', examples/read_parquet_specific_columns.rs:95:79

Could potentially make it even better by doing a diff.

[ncpenke]

Great idea!

[ncpenke]

Blocked by #54