mac: Random failing CopyMoveElementsTests.testCopyFieldForce

failed in two MacOS builds:
```
junit.framework.AssertionFailedError: No delta found for class Y [in Y.java [in [in src [in P]]]]
boolean foo
int foo#2, all deltas: [Java Model[*]: {CHILDREN}
P[*]: {CHILDREN}
src[*]: {CHILDREN}
[*]: {CHILDREN}
Y.java[*]: {CONTENT | PRIMARY RESOURCE}]
at junit.framework.Assert.fail(Assert.java:57)
at junit.framework.TestCase.fail(TestCase.java:223)
at org.eclipse.jdt.core.tests.model.CopyMoveTests.copyPositive(CopyMoveTests.java:122)
at org.eclipse.jdt.core.tests.model.CopyMoveElementsTests.testCopyFieldForce(CopyMoveElementsTests.java:215)

```
both:
https://download.eclipse.org/eclipse/downloads/drops4/I20240611-0150/testresults/html/org.eclipse.jdt.core.tests.model_ep433I-unit-macM1-java17_macosx.cocoa.aarch64_17.html
https://download.eclipse.org/eclipse/downloads/drops4/I20240611-0150/testresults/html/org.eclipse.jdt.core.tests.model_ep433I-unit-mac64-java17_macosx.cocoa.x86_64_17.html

May relate to another random fail of CopyMoveElementsTests.testCopyConstructorInDifferentProject:
https://github.com/eclipse-jdt/eclipse.jdt.core/issues/1094