RFR: 8319944: Remove DynamicDumpSharedSpaces

[Ioi Lam]

Please review this cleanup. Most of the changes are the following patterns:

- `if (DumpSharedSpaces)` => `if (CDSConfig::is_dumping_dynamic_archive())`
- `DumpSharedSpaces = true` => `CDSConfig::enable_dumping_dynamic_archive()`
- `DumpSharedSpaces = false` => `CDSConfig::disable_dumping_dynamic_archive()`

-------------

Commit messages:
 - 8319944: Remove DynamicDumpSharedSpaces

Changes: https://git.openjdk.org/jdk/pull/16626/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16626&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319944
  Stats: 60 lines in 15 files changed: 10 ins; 8 del; 42 mod
  Patch: https://git.openjdk.org/jdk/pull/16626.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16626/head:pull/16626

PR: https://git.openjdk.org/jdk/pull/16626