Only reinit rules when inventory capacity enabled

[cconard96]

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• I have read the CONTRIBUTING document.
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• I have added tests that prove my fix is effective or that my feature works.
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Description

Fixes #18304
Rules should only be re-initialized when the inventory capacity of an asset definition is enabled, not every time the capacity is bootstrapped. Rules take a long time to initialize even for a single class, and the bootstrap process happens for every request.

[trasher]

Tests are broken

[trasher]

I guess the problem is you rely on post_update to add rules. That's correct from the UI point of view; but from tests, capacities are added on add; there is no update.

[cconard96]

I did have a commit (I removed it after) that added code for post add too, but the tests still fail. I struggled with various combinations of bootstrapping the classes and capacities. When running a single test, it worked. If a second test runs, it fails as if the new asset definition isn't bootstrapped.

[trasher]

I've tried to use post_add; but I got problems on rules initialization. Since it was previously done on asset class bootstrap; the custom asset was entirely created - while it's not using post_add.

No further idea for now.