Standardize (almost) all tests on Truth (#1242)

* Replace assertj calls with Truth where possible

* Update test dependencies

* adapters

* reflect

* codegen

* moshi

* Add missing inOrder()

* Spotless

kotlin/reflect/build.gradle.kts

@@ -25,5 +25,5 @@ dependencies {
 
   testImplementation(kotlin("test"))
   testImplementation(Dependencies.Testing.junit)
-  testImplementation(Dependencies.Testing.assertj)
+  testImplementation(Dependencies.Testing.truth)
 }