[PDI-10807][SP-1096][SP-1099]: Fix PMR on Windows

Removed conditional logic based on version number as it is fragile and incorrect for vendors' distributions. Instead default to a Linux path separator (colon). This is now overridable via the config.properties file for things like Windows clusters, or if the distro is using a version of Hadoop for which the Distributed Cache classpath separator was changed to be a comma. The latter has (so far) already been done for the appropriate shims.