THRIFT-5581: use gradle 7 for java/kotlin (#2601)

* upgrade gradle version to 7.4
* migrate from `maven` plugin to `maven-publish` plugin as required for Gradle 7
* add guard to ktfmt, since it can't run with JDK 8

Co-authored-by: Christopher Tubbs <ctubbsii@apache.org>
diff --git a/lib/kotlin/build.gradle.kts b/lib/kotlin/build.gradle.kts
index 1f7711a..90b9e80 100644
--- a/lib/kotlin/build.gradle.kts
+++ b/lib/kotlin/build.gradle.kts
@@ -41,8 +41,10 @@
 }
 
 tasks {
-    ktfmt {
-        kotlinLangStyle()
+    if (JavaVersion.current().isJava11Compatible) {
+        ktfmt {
+            kotlinLangStyle()
+        }
     }
 
     test {