fix(arrow-array): deprecate FixedSizeListArray::value_offset, which wraps past i32::MAX

[Cintu07]

Which issue does this PR close?

• Closes FixedSizeListArray::value_offset wraps past i32::MAX, and the avro writer panics on it #11059.

Rationale for this change

FixedSizeListArray::value_offset casts a usize offset to i32, so once a row starts past i32::MAX child values it returns a negative number. the avro FixedSizeList encoder cast that back to usize and panicked writing the batch.

What changes are included in this PR?

• deprecate value_offset in favour of i * value_length() as usize, same as FixedSizeBinaryArray::value_offset in [arrow-array] use usize arithmetic in FixedSizeBinaryArray, aggressive overflow checks #9910, and panic instead of wrapping
• the avro encoder uses idx * elem_len instead
• take_value_indices_from_fixed_size_list computes the offset in usize and returns an error when it doesn't fit u32
• the value_offset asserts come out of the tests, and the slice test checks row values instead

Are these changes tested?

yes. fixed_size_list_encoder_int32_sliced is new and covers the avro change. the overflow itself needs 384 MiB so it isn't a unit test, but the repro from the issue panics on 59.3.0 and writes the batch on this branch. arrow-array 972, arrow-select 446 and arrow-avro 515 tests pass, and clippy is clean.

Are there any user-facing changes?

FixedSizeListArray::value_offset is deprecated and panics past i32::MAX. take on a FixedSizeList returns an error past u32::MAX instead of wrapping.