move files sushid/safepower_agent -> borg_mgmt/node_proxy/safepower/
   - change path for all includes
   - update include guard
   - update the build files

Tested:
http://sponge2/f231bd88-534a-44c9-980e-ae077c69f51a (build of changed test)
PiperOrigin-RevId: 767320460
Change-Id: I27bd8e7a9ed442105131391fe16aa5c3d041b0df
46 files changed