[BUG] generate mocks cannot find designsystem/core

[kodeaben]

• I have written a good issue

Describe the bug

In the buildpipeline, the "Kirby setup" step failes with the following error:
tools/generate-mocks/generate-mocks.ts(6,26): error TS2307: Cannot find module '@kirbydesign/core/custom-elements' or its corresponding type declarations.

The error was first seen in a PR after Kirby v8.0.0 was released.

Link to a failing build: https://github.com/kirbydesign/designsystem/actions/runs/4142850657/jobs/7329113678

Describe how to reproduce the bug

Go to the link

Which Kirby version was used?

8.0.0

What was the expected behavior?

Not to have an error

Add any screenshots

Please complete the following information:

N/A -> is't in the. pipeline

Are there any additional context?

The bug doesn't appear to happen locally, where core is symlinked

The bug appears to happen sporadically, since the following PR's were created and merged after the release of v.8.0.0, without the error occuring:
#2866
#2865

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Verification

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• Make sure the NOT verified label has been removed by a member of team Kirby; do not proceed until this is done

Implementation

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• Create a branch from the develop branch following our branch naming convention.
• Create a test that reproduces the bug following guidelines in: "The good: Test".
• Write code to fix the bug

Review

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