RFR: 8293046: Move CDS command-line flags to cds_globals.hpp

[Ioi Lam]

Flags like `VerifySharedSpaces`, `SharedBaseAddress`, `DumpLoadedClassList`, etc, should be moved from globals.hpp to a new file, src/hotspot/share/cds/cds_globals.hpp

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Commit messages:
 - 8293046: Move CDS command-line flags to cds_globals.hpp

Changes: https://git.openjdk.org/jdk/pull/10073/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10073&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293046
  Stats: 188 lines in 17 files changed: 127 ins; 59 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10073.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10073/head:pull/10073

PR: https://git.openjdk.org/jdk/pull/10073