RFR: 8281941: Change CDS warning messages to use Unified Logging

Fri Mar 10 14:42:15 UTC 2023

On Fri, 10 Mar 2023 01:03:50 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

>> As an addendum to previous commits that changed CDS logging, this replaces the remaining log messages with Unified logging. There are also old warning messages that used to be prefixed with UseSharedSpaces which have been updated along with their tests.
>
> LGTM

Thank you for the reviews @calvinccheung and @dholmes-ora.

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PR: https://git.openjdk.org/jdk/pull/12890