Add dyn_arith_dict feature flag

[tustvold]

Which issue does this PR close?

Follow on to #2597

Rationale for this change

$ time cargo build --release --no-default-features
________________________________________________________
Executed in   22.13 secs    fish           external
   usr time  120.80 secs  561.00 micros  120.80 secs
   sys time    3.70 secs  107.00 micros    3.69 secs

$ time cargo build --release --no-default-features --features dyn_arith_dict
________________________________________________________
Executed in   38.73 secs    fish           external
   usr time  167.26 secs  613.00 micros  167.26 secs
   sys time    4.26 secs  106.00 micros    4.26 secs

What changes are included in this PR?

Gates arithmetic operations between primitive dictionary arrays behind a feature flag. Primitive dictionaries are fairly niche, array operations on primitive dictionaries are even more niche. I think the benefits to compilation time justify the overheads of an additional feature flag

Are there any user-facing changes?

Arithmetic operations on dictionaries now require enabling via a feature flag

[viirya]

Hmm, as add_dyn has no the feature attribute, I thought that it cannot be built. But it appears not.

[ursabot]

Benchmark runs are scheduled for baseline = 5b601b3 and contender = 74f639c. 74f639c 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