Add ActiveStorage as a core dependency

[tvdeyen]

Summary

We use ActiveStorage::Current in our BaseControllers since a3119d5 but we never depended on it.

For stores never having activestorage as dependency this was breaking.

This reverts #5450

Checklist

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[codecov]

Codecov Report

Merging #5479 (d495087) into main (39b1c92) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #5479   +/-   ##
=======================================
  Coverage   88.93%   88.93%           
=======================================
  Files         622      622           
  Lines       14908    14909    +1     
=======================================
+ Hits        13258    13259    +1     
  Misses       1650     1650           

Files	Coverage Δ
core/lib/spree/core.rb	98.79% <100.00%> (+0.01%)	⬆️

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[github-actions]

💚 All backports created successfully

Status	Branch	Result
✅	v3.4
✅	v4.0
✅	v4.1
✅	v4.2

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