acm aradise From Hawaii to Fiji, tropical retreats in the Pacific Ocean offer a complete change of pace for honeymooning couples. BY ANNE B ElV\ ETT SWINGLE bonanza of sunny tropical retreats in the Pacific Ocean awaits newlyweds in search of the perfect honeymoon destination. Far-flung playgrounds in the South Pacific offer a complete change of pace, a momentary respite wedged between the wedding madness and the inevitable onslaught of work-a- day realities. Following are tips on what to do and where to stay along the western coast of Mexico, Hawaii, French Polynesia and Fiji. A Pacific Coast of Mexico In Acapulco, the sun shines 360 days out of