Revert "valgrind.supp: be less picky about library versions"

This reverts commit f895d16c9e2fd59aab446254e53480cdb91092a1.
valgrind: fix tcmalloc suppression for trusty

Fixes: #8225
Signed-off-by: Sage Weil <sage@inktank.com>
Fixes #8050 Adds a cluster.yaml that is written by interactive task
These will likely go somewhere better before merge
Moves node: remote mapping to the internal task.
Changes invocation of serialize_remote_roles to internal task to avoid being run during nuke