RFR: 8377777: Improve logging when rejecting methods on the archive

[María Arias de Reyna Domínguez]

Restored the check `if (resolved)` when printing if a CP entry is rejected or archived. If it is not resolved, we shouldn't even bother with it.

Also, added log messages (mostly based on surrounding comments) on `ConstantPoolCache::can_archive_resolved_method` to add information about why a method gets rejected.

All the log messages have the same format to be able to parse them easily:

` log.print("%s can't be archived because $REASON.",
                pool_holder->name()->as_C_string());`

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Commit messages:
 - removing extra new line that shouldn't be there
 - JDK-8377777 Improve logging when rejecting methods on the archive

Changes: https://git.openjdk.org/jdk/pull/29690/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29690&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377777
  Stats: 51 lines in 1 file changed: 34 ins; 0 del; 17 mod
  Patch: https://git.openjdk.org/jdk/pull/29690.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29690/head:pull/29690

PR: https://git.openjdk.org/jdk/pull/29690