[AI-FSSDK] [FSSDK-12958] Continue rule evaluation after local holdout hit

[alexjoeyyong]

Summary

A local holdout hit used to return the holdout variation right away and skip every remaining rule for the flag. Now a hit only excludes the user from that one rule, and evaluation moves on to the next experiment or delivery rule. Each hit still sends its own holdout impression.

Changes

• A local holdout hit on an experiment or delivery rule skips only that rule, and evaluation continues with the next one, with no jump to Everyone Else
• All holdout hits for a flag are collected in a list. The existing single holdout field stays, is marked deprecated, and holds the first hit
• decide sends one holdout impression per hit, whatever sendFlagDecisions is set to; DISABLE_DECISION_EVENT still turns them off
• Legacy APIs skip a locally held-out rule and send no holdout event, the same way they treat global holdouts bypassed by excludeTargetedDeliveries

Jira Ticket

FSSDK-12958

[coveralls]

coverage: 77.584% (-0.04%) from 77.624% — ai/alexjoeyyong/FSSDK-12958-local-holdout-flow-fix into master