Straighten out replication/cache behavior in "bin/storage dump"

Summary:
Fixes T13336.

• Prevent --no-indexes from being combined with --for-replica, since combining these options can only lead to heartbreak.
• In --for-replica mode, dump caches too. See discussion in T13336. It is probably "safe" to not dump these today, but fragile and not correct.
• Mark the "MarkupCache" table as having "Cache" persistence, not "Data" persistence (no need to back it up, since it can be fully regenerated from other datasources).

Test Plan: Ran bin/storage dump with various combinations of flags.

Maniphest Tasks: T13336

Differential Revision: https://secure.phabricator.com/D20743