RFR: 8344134: Use static property in SystemLookup

[Per Minborg]

On Mon, 18 Nov 2024 15:25:06 GMT, Eirik Bjørsnøs <eirbjo at openjdk.org> wrote:

> Drive by observation: In java.base, there are four similar instances in `ImageReaderFactory.JAVA_HOME`, `SystemImage::findHome`, `CDS::dumpSharedArchive` and `DomainName::getPubSuffixStream`.

Good find: Let's fix them under this issue: https://bugs.openjdk.org/browse/JDK-8344419

-------------

PR Comment: https://git.openjdk.org/jdk/pull/22205#issuecomment-2483508936