Fix conda build after #3407

[freddyaboulton]

Pull Request Description

Need to skip some arima tests during the conda build

---

After creating the pull request: in order to pass the release_notes_updated check you will need to update the "Future Release" section of docs/source/release_notes.rst to include this pull request by adding :pr:123.

[codecov]

Codecov Report

Merging #3429 (9e4ea83) into main (ee69b0f) will increase coverage by 0.1%.
The diff coverage is 100.0%.

@@           Coverage Diff           @@
##            main   #3429     +/-   ##
=======================================
+ Coverage   99.7%   99.7%   +0.1%     
=======================================
  Files        332     332             
  Lines      32545   32548      +3     
=======================================
+ Hits       32415   32418      +3     
  Misses       130     130             

Impacted Files	Coverage Δ
evalml/tests/automl_tests/test_automl.py	99.5% <100.0%> (+0.1%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ee69b0f...9e4ea83. Read the comment docs.

[jeremyliweishih]

thank you!