Update Gradle version to 7.6

Also fix 2 deprecation warnings:

Update reports according to api,
replacing enabled with required

Adding explicit task dependency
when using generated sources as input.

Third deprecation warning is due to usage
inside the io.spring.dependency-management plugin
and cannot be fixed until plugin is updated.

build.gradle

@@ -41,8 +41,8 @@ subprojects {
 
     jacocoTestReport {
         reports {
-            xml.enabled = true
-            html.enabled = true
+            xml.required = true
+            html.required = true
         }
     }
     test {

core-common/build.gradle

@@ -174,6 +174,11 @@ tasks.named("compileJava").configure {
     source(generateAvro)
 }
 
+tasks.named("checkstyleMain").configure {
+    dependsOn(generateAvro)
+    dependsOn(tasks.named('compileTestJava')) //Probably incorrect dependency but Gradle did not recognise the above one
+}
+
 sourceSets {
     main {
         java {

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.9.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists