build(deps): update dependency org.eclipse.jdt:org.eclipse.jdt.core to v3.42.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.eclipse.jdt:org.eclipse.jdt.core (source)	3.41.0 -> 3.42.0

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[SirYwell]

I addressed source code incompatibilities, but there are a few more things to figure out. It looks like we don't visit (and therefore include) default ctors for records anymore. I didn't check how we deal with that for normal classes. Also we print the record component field representations differently, I'm not sure why that becomes a problem now.

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[monperrus]

thanks @SirYwell for looking into this. important to stay up-to-date with JDT.

[SirYwell]

It looks like the synthetic canonical constructors aren't available anymore, so we would need to build them ourselves. I'm just not sure where this should happen (we could do it incrementally when visiting the record components, but we need to make sure that this constructor is deleted if there is an explicit one).