Add missing inline to ArrowNativeTypeOp

[tustvold]

Which issue does this PR close?

Closes #.

Rationale for this change

This is necessary for inlining to work across crate boundaries, which is in turn necessary for the compute kernels to vectorise correctly.

This fixes a significant performance regression introduced by #3018

neq scalar Float32      time:   [7.3047 µs 7.3067 µs 7.3091 µs]
                        change: [-93.528% -93.515% -93.507%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
  7 (7.00%) high mild
  1 (1.00%) high severe

What changes are included in this PR?

Are there any user-facing changes?

[ursabot]

Benchmark runs are scheduled for baseline = a0fb44a and contender = 0e97338. 0e97338 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java