Downgrade kotlin in misk to 1.9 to potentially address gradle

config cache errors

GitOrigin-RevId: df83ecac56edb936f53f85e0a1689ccf39b44abd

Author: mmollaverdi

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ hoplite = "2.7.5"
 jackson = "2.18.2"
 junit = "5.11.4"
 kotest = "5.9.1"
-kotlin = "2.0.21"
+kotlin = "1.9.25"
 kotlinBinaryCompatibilityPlugin = "0.17.0"
 mavenPublish = "0.28.0"
 micrometer = "1.12.13"