[Non-Root Installer] [RPM] Dependency check should supply the --ignoresize flag

What's the issue?
The non-root installer currently performs dependency checks before installing the couchbase-server package, for RPM packages, we use rpm --test.

This will perform disk space checks to ensure there's enough space in /opt to install the package, this check doesn't apply in the non-root case install case, given the install will be in a different location.

What's the workaround?
Ensure that the /opt directory has enough room to install couchbase-server.

What's the fix?
The --ignoresize flag should be used to disable this check.