feat(cheatcodes): add support for vm.expectCall on internal calls

[clauBv23]

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Describe the feature you would like

Currently, expectCall doesn’t work for internal calls.

This limitation is highlighted in the documentation, but seems like there is no open issue addressing this (issue #432 is closed).

I wonder if there is a workaround for achieving this in Foundry.
In case there isn't, I believe this would be a very helpful feature that would simplify the testing process significantly.

Having expectCall support internal calls would enhance the functionality and flexibility of Foundry's testing capabilities.

Additional context

No response