Pin appcheck-interop dependency to latest released version (#6242)

There's no need for functions to depend at a project level on the
appcheck interop library.

Author: rlazo

firebase-functions/firebase-functions.gradle.kts

@@ -62,7 +62,7 @@ dependencies {
     implementation("com.google.firebase:firebase-annotations:16.2.0")
     implementation("com.google.firebase:firebase-common:20.3.1")
     implementation("com.google.firebase:firebase-components:17.1.0")
-    implementation(project(":appcheck:firebase-appcheck-interop"))
+    implementation("com.google.firebase:firebase-appcheck-interop:17.1.0")
     implementation(libs.kotlin.stdlib)
     implementation(libs.playservices.base)
     implementation(libs.playservices.basement)