feat(core): add coretest package (#20487)

Co-authored-by: unknown unknown <unknown@unknown>

core/testing/sonar-project.properties

@@ -0,0 +1,16 @@
+sonar.projectKey=cosmos-sdk-core-testing
+sonar.organization=cosmos
+
+sonar.projectName=Cosmos SDK - Core Testing
+sonar.project.monorepo.enabled=true
+
+sonar.sources=.
+sonar.exclusions=**/*_test.go,**/*.pb.go,**/*.pulsar.go,**/*.pb.gw.go
+sonar.coverage.exclusions=**/*_test.go,**/testutil/**,**/*.pb.go,**/*.pb.gw.go,**/*.pulsar.go,test_helpers.go,docs/**
+sonar.tests=.
+sonar.test.inclusions=**/*_test.go
+sonar.go.coverage.reportPaths=coverage.out
+
+sonar.sourceEncoding=UTF-8
+sonar.scm.provider=git
+sonar.scm.forceReloadAll=true