[Bug][Prism]: unsupported feature "WindowStrategy.AllowedLateness" set with MaxTimestamp.

[damondouglas]

Several Java tests fail on Prism with the error:

unsupported feature "WindowingStrategy.AllowedLateness" set with value 9223372036854775

Steps to reproduce:

1. Run Prism server.

./gradlew :runners:prism:runServer

2. Execute :runners:portability:java:ulrLoopbackValidatesRunnerTests on Prism:

Many tests fail with these errors, but to see the output of one quickly:

TEST=org.apache.beam.sdk.transforms.ReshuffleTest
./gradlew :runners:portability:java:ulrLoopbackValidatesRunnerTests -PjobEndpoint=localhost:8073 --tests="$TEST"

Parent tracker: #28187
Related: #31438

[lostluck]

The PR didn't implement allowed lateness, just permitting it to be set with the maximum timestamp. However, this smaller change feels safe enough WRT how the tests cared for allowed lateness, so leaving this issue closed.