When Applier applies mutations to the destination cluster, it advances the
mutation cursor twice when it should only advance it once.
This makes restore miss some mutations when the applying txn includes
more than 1 mutations.
Because the current restore has defined RestoreConfig, windows linker complains.
This commit rename the RestoreConfig used in FastRestore as RestoreConfigFR.
1) Should recruit only configured number of roles;
2) Should never register a restore master interface as a restore worker (loader or applier) interface.
1) Do not keep restore role data (e.g., masterData) in restore worker;
2) Change function parameter list by only passing in the needed variables in role data;
3) Remove unneccessary files vector from masterData;
4) Change typos in comments and some functions name.
Meng Xu