Replace AbstractFateStore.verifyReserved() with new method FateMutator.requireReserved()

[Amemeda]

Add new method to FateMutator.java that requires a FateId to be reserved for certain transactions. This method will replace AbstractFateStore.verifyReservedAndNotDeleted() implementation in UserFateStore.java.

• Added FateMutator.requireReserved() and its implementation in FateMutatorImpl.java. requireReserved() requires a transaction to be reserved with a specific FateStore.FateReservation.
• Removed usages of verifyReservedandNotDeleted() from UserFateStore.java methods. To replace its implementation, new method requireReserved() was appended onto existing newMutators in push(), pop(), setStatus(), setTransactionInfo(), delete(), and forceDelete(). For methods top(), getStack(), getTransactionInfo(), and timeCreated(), verifyReservedandNotDeleted() simply was removed.

Closes #4908

[Amemeda]

(OUTDATED)
Since verifyReservedAndNotDeleted() was removed from UserFateStore.java, new requireReserved() was implemented in its place on the FateMutator side. However, in 4 UserFateStore.java methods (top, getStack, getTransactionInfo, timeCreated) there is no corresponding fateMutator method being called where requireReserved() should be added. Unsure how to replace implementation for these 4 methods.

[DomGarguilo]

Pretty sure all these spots can just be removed instead of replaced. verifyReservedAndNotDeleted(false) is a no-op. Also this newMutator(fateId).requireReserved(reservation); creates a conditional mutation but never sends it which we don't want or need to do.

[DomGarguilo]

Suggested change

	newMutator(fateId).requireReserved(reservation).putStatus(status).mutate();
	newReservedMutator().putStatus(status).mutate();

It might be nice to create a helper in this class that returns newMutator(fateId).requireReserved(reservation). Then we can just replace the newMutator() calls with newReservedMutator().

It also has the benefit of making the code shorter and we can add a check in this new helper method like
Preconditions.checkState(!deleted, Attempted write on deleted FATE transaction: " + fateId); for completeness