Change in behavior of extension loading in v1.11 #56426
Description
Suppose I have a package A with an extension that depends on packages B and C. Package B also depends on C. On Julia v1.10, if I loaded packages A and B, the extension would be loaded. But on Julia v1.11, it seems that I must also explicitly load package C for the extension to be loaded.
I created a repo demonstrating this change in behavior: https://github.com/sethaxen/ExtensionsTestDemo.jl, where A=ExtensionTestDemo, B=StatsBase, C=Random. The tests check whether the extension is loaded depending on which dependencies are loaded, and the CI (e.g. https://github.com/sethaxen/ExtensionsTestDemo.jl/actions/runs/11652519441) demonstrates the change in behavior between v1.10 and v1.11.