RFR: 7903933: Move sharable items from different generations to a common file [v8]

[Nizar Benalla]

On Tue, 6 May 2025 17:54:07 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   update test
>
> test/testng/org/openjdk/jextract/test/toolprovider/TestClassGeneration.java line 195:
> 
>> 193:     public void testFunctionalInterface(String name, MethodType type) {
>> 194:         Class<?> fpClass = loader.loadClass("com.acme." + name);
>> 195:         checkPrivateConstructor(fpClass);
> 
> Same here, these changes seem unrelated.

This is also related to making the utility classes final with a private constructor.

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PR Review Comment: https://git.openjdk.org/jextract/pull/278#discussion_r2077340632