LegacyTokenData: relax float check, round up max #4353

Job	Run time
++2.13.13 download-scala-library testsJVM/slow:test	3m 28s
communitytest/test	4m 25s
Scalafmt	28s
testOlderScalaOnJVM (2.11.12)	3m 44s
mima	5m 43s
testLatestScala (JVM, 2.12.19, 8)	3m 15s
testOlderScalaOnJVM (2.12.16)	3m 17s
testLatestScala (JVM, 2.12.19, 21)	3m 15s
Windows tests	4m 6s
testOlderScalaOnJVM (2.12.17)	3m 5s
testLatestScala (JVM, 2.13.13, 8)	3m 4s
testOlderScalaOnJVM (2.12.18)	3m 8s
testLatestScala (JVM, 2.13.13, 21)	2m 56s
testOlderScalaOnJVM (2.13.10)	3m 14s
testLatestScala (JS, 2.12.19, 8)	3m 50s
testLatestScala (JS, 2.12.19, 21)	3m 37s
testOlderScalaOnJVM (2.13.11)	3m 10s
testLatestScala (JS, 2.13.13, 8)	3m 39s
testLatestScala (JS, 2.13.13, 21)	3m 47s
testLatestScala (Native, 2.12.19, 8)	4m 4s
testOlderScalaOnJVM (2.13.12)	2m 58s
testLatestScala (Native, 2.12.19, 21)	4m 13s
testLatestScala (Native, 2.13.13, 8)	4m 4s
testLatestScala (Native, 2.13.13, 21)	4m 17s
	1h 24m 47s

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