Use littleendian arrow files for projection_should_work

[viirya]

Which issue does this PR close?

Closes #1548.

Rationale for this change

Currently by enabling force_validate, the test projection_should_work fails.

cargo test --features=force_validate -p arrow

---- ipc::reader::tests::projection_should_work stdout ----
thread 'ipc::reader::tests::projection_should_work' panicked at 'called `Result::unwrap()` on an `Err` value: InvalidArgumentError("Last offset 251658240 of List(Field { name: \"item\", data_type: Int32, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: None }) is larger than values length 15")', arrow/src/array/data.rs:301:34

It is because the arrow files used in the test is bigendian, but currently the IPC reader doesn't translate big endian offsets (#859). As that's a known issue, I change the test to use littleendian arrow files, and add a comment there to explain the reason.

What changes are included in this PR?

Are there any user-facing changes?

[viirya]

This is also due to bigendian offsets. So I uncomment it too.

[codecov-commenter]

Codecov Report

Merging #1573 (c9a0e93) into master (dbc47e0) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1573      +/-   ##
==========================================
- Coverage   82.87%   82.87%   -0.01%     
==========================================
  Files         193      193              
  Lines       55304    55304              
==========================================
- Hits        45835    45834       -1     
- Misses       9469     9470       +1     

Impacted Files	Coverage Δ
arrow/src/ipc/reader.rs	88.61% <ø> (ø)
arrow/src/datatypes/datatype.rs	66.40% <0.00%> (-0.40%)	⬇️
arrow/src/array/transform/mod.rs	86.35% <0.00%> (-0.12%)	⬇️
parquet_derive/src/parquet_field.rs	66.21% <0.00%> (+0.22%)	⬆️

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[tustvold]

TIL https://arrow.apache.org/docs/format/Columnar.html#byte-order-endianness

[Dandandan]

Thanks for fixing, this was an oversight of me!

[viirya]

Thanks @tustvold @Dandandan !