Add junit-platform-launcher to endtoendtests and samples-azure-functions

JUnit 5.12+ requires junit-platform-launcher to be explicitly declared.
This was already added to client and azuremanaged modules but was
missing from endtoendtests and samples-azure-functions, causing the
functions-e2e-tests and functions-sample-tests CI jobs to fail.

Co-authored-by: torosent <17064840+torosent@users.noreply.github.com>

Author: Copilot

endtoendtests/build.gradle

@@ -20,6 +20,7 @@ dependencies {
 
     implementation 'com.microsoft.azure.functions:azure-functions-java-library:3.2.3'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.14.2'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
     testImplementation 'io.rest-assured:rest-assured:5.5.7'
     testImplementation 'io.rest-assured:json-path:5.5.7'
 

samples-azure-functions/build.gradle

@@ -20,6 +20,7 @@ dependencies {
 
     implementation 'com.microsoft.azure.functions:azure-functions-java-library:3.2.3'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.14.2'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
     testImplementation 'io.rest-assured:rest-assured:5.5.7'
     testImplementation 'io.rest-assured:json-path:5.5.7'