fix(#2591): findComponent doesn't not return exposed properties in vm

[adamberecz]

After investigating the issue down to @vue/runtime-core it appears that exposeProxy is only set in a script-setup component if it uses at least one directive:
https://github.com/vuejs/core/blob/main/packages/runtime-core/src/component.ts#L1187
https://github.com/vuejs/core/blob/main/packages/runtime-core/src/directives.ts#L143

Meaning a component can have an exposed API while exposeProxy is null. In this case we can create manually from exposed which essentially has the same effect, because the one created by runtime-core is only different by also proxying publicPropertiesMap which aren't available anyway.

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[cexbrayat]

Thank you for looking into it. Would you mind adding a unit test that showcases that the issue no longer exists?

[cexbrayat]

Hi @adamberecz

Would you mind adding some unit tests to the PR so we can merge it?

[adamberecz]

I've stumbled upon another issue related to using devtoolsRawSetupState which might not be available in some cases. I'm still investigating it as it might also affect this behavior. I'll get to you and possibly update the PR (+ add some tests).

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[adamberecz]

@cexbrayat – I've added some test and refactored the fix. It should be good to go.

[cexbrayat]

@adamberecz Thanks for updating the PR, can you take a look at the build failures?