8315024: Vector API FP reduction tests should not test for exact equality

test/jdk/jdk/incubator/vector/Double128VectorTests.java

test/jdk/jdk/incubator/vector/Double256VectorTests.java

test/jdk/jdk/incubator/vector/Double512VectorTests.java

test/jdk/jdk/incubator/vector/Double64VectorTests.java

test/jdk/jdk/incubator/vector/DoubleMaxVectorTests.java

test/jdk/jdk/incubator/vector/Float128VectorTests.java

test/jdk/jdk/incubator/vector/Float256VectorTests.java

test/jdk/jdk/incubator/vector/Float512VectorTests.java

test/jdk/jdk/incubator/vector/Float64VectorTests.java

test/jdk/jdk/incubator/vector/FloatMaxVectorTests.java

...ubator/vector/templates/Unit-Reduction-Masked-op.template

...jdk/incubator/vector/templates/Unit-Reduction-op.template

test/jdk/jdk/incubator/vector/templates/Unit-header.template