Prevent the toolkit latest deprecation warning from being logged more than once

[Gedochao]

Adding the toolkit dependency with the deprecated latest version causes the warning to be logged no less than 6 times (sic!)

scala-cli --toolkit latest -e 'println(os.pwd)'
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Compiling project (Scala 3.3.1, JVM (17))
# Compiled project (Scala 3.3.1, JVM (17))
# ~/IdeaProjects/scala-cli-tests

This scales it down to a reasonable and desired once.

scala-cli --toolkit latest -e 'println(os.pwd)'
# Using 'latest' for toolkit is deprecated, use 'default' to get more stable behaviour:
#  --toolkit default
# Compiling project (Scala 3.3.1, JVM (17))
# Compiled project (Scala 3.3.1, JVM (17))
# ~/IdeaProjects/scala-cli-tests