[Build] Move JUnit dependencies into the version catalog

The `kotlin-test` dependencies are left untouched as changing them affects publications, thus these versions are independent from the used inside our build
#KTI-1349 In Progress

wasm/wasm.ir/build.gradle.kts

@@ -54,7 +54,7 @@ dependencies {
 
     implementation(kotlinStdlib())
     implementation(kotlinxCollectionsImmutable())
-    testImplementation(commonDependency("junit:junit"))
+    testImplementation(libs.junit4)
     testCompileOnly(project(":kotlin-test:kotlin-test-jvm"))
     testCompileOnly(project(":kotlin-test:kotlin-test-junit"))
     testImplementation(projectTests(":compiler:tests-common"))

wasm/wasm.tests/build.gradle.kts

@@ -61,7 +61,7 @@ val jsShell by configurations.creating {
 }
 
 dependencies {
-    testApi(commonDependency("junit:junit"))
+    testApi(libs.junit4)
     testApi(projectTests(":compiler:tests-common"))
     testApi(projectTests(":compiler:tests-common-new"))
     testApi(intellijCore())