Check file type for shared class cache jar files

[theresa-m]

Use the port library to check if path leads to a directory or file to support jar files that may not have the typical *.jar ending.

Fixes: https://github.com/eclipse-openj9/openj9/issues/19378

[theresa-m]

With this change the test described in https://github.com/eclipse-openj9/openj9/issues/19378 has 0% stale classes:

# Stale classes                      = 0
% Stale classes                      = 0%

[hangshao0]

Jenkins test sanity,extended plinux jdk17

[hangshao0]

Jenkins test sanity,extended win jdk8

[hangshao0]

Jenkins test sanity,extended xlinux jdk21

[hangshao0]

I aborted the JDK17_ppc64le_linux build as there are no machines available.

[hangshao0]

@theresa-m There are test failures on Windows Java 8.

[hangshao0]

jenkins line endings check

[hangshao0]

Jenkins test sanity,extended win jdk8

[hangshao0]

Jenkins test sanity,extended xlinux jdk21

[hangshao0]

Test failures in: https://openj9-jenkins.osuosl.org/job/Test_openjdk8_j9_sanity.functional_x86-64_windows_Personal_testList_1/424/

[theresa-m]

From my understanding the failing tests cmdLineTester_SCHelperCompatTests_win_0 and cmdLineTester_SCHelperCompatTests_win_1 are meant to be disabled. See https://github.com/eclipse-openj9/openj9/pull/14474

[pshipton]

They are only excluded for AOT testing. They run and pass nightly. https://hyc-runtimes-jenkins.swg-devops.com/job/Test_openjdk8_j9_sanity.functional_x86-64_windows/573

AOT testing is a special test mode where the tests are run once to populate AOT, and then run a second time to use the AOT.

[theresa-m]

I have verified with a personal build that windows sanity and extended tests are passing now.

I moved correctURLPath inside getCpeTypeForProtocol so that all calls to this method will have the correctly formatted path for windows.

[theresa-m]

Thanks Hang and Keith, this is ready for another review.

[keithc-ca]

Jenkins test sanity,extended alinux jdk21

[hangshao0]

Jenkins test sanity,extended win jdk8