When a shard becomes search active then trigger a refresh instead of waiting for the next scheduled refresh.
The `IndexShard#awaitShardSearchActive(...)` method registers a refresh listener and then often waits for the refresh scheduler to trigger a refresh. By default this is one second. In order to avoid increasing the query time of the Search API, the mentioned method should trigger a refresh instead for waiting it to happen.

As part of this change we also need to disable the refresh scheduler completely. Otherwise we run at risk of running two refreshes next after each other. One triggered from making shard search active and one from the refresh scheduler.  



server/src/main/java/org/elasticsearch/index/shard/IndexShard.java
shardId,
                IndexShardState.STARTED,
                ": primary relocation is forbidden while primary-replica resync is in progress " + shardRouting
            );
        }
    }
    @Override
    public IndexShardState state() {
        return state;
    }
    /**
     * Changes the state of the current shard
     *
     * @param newState the new shard state
     * @param reason   the reason for the state change
     * @return the previous shard state
     */
    private IndexShardState changeState(IndexShardState newState, String reason) {
        assert Thread.holdsLock(mutex);
        logger.debug("state: [{}]->[{}], reason [{}]", state, newState, reason);
        IndexShardState previousState = state;
        state = newState;
        this.indexEventListener.indexShardStateChanged(this, previousState, newState, reason);
        return previousState;
    }
    public Engine.IndexResult applyIndexOperationOnPrimary(
        long version,
        VersionType versionType,
        SourceToParse sourceToParse,
        long ifSeqNo,