Stop pinning tests on main to 8.13.0 now that 8.14.0-SNAPSHOT exists (#4325)

* Remove pin to 8.13.0 now that 8.14.0-SNAPSHOT exists.

* Remove skipped test that needs 8.14.0-SNAPSHOT.

Author: cmacknz

.buildkite/scripts/steps/integration_tests.sh

@@ -11,7 +11,7 @@ MAGE_SUBTARGET="${3:-""}"
 # Override the agent package version using a string with format <major>.<minor>.<patch>
 # NOTE: use only after version bump when the new version is not yet available, for example:
 # OVERRIDE_AGENT_PACKAGE_VERSION="8.10.3" otherwise OVERRIDE_AGENT_PACKAGE_VERSION="".
-OVERRIDE_AGENT_PACKAGE_VERSION="8.13.0"
+OVERRIDE_AGENT_PACKAGE_VERSION=""
 
 if [[ -n "$OVERRIDE_AGENT_PACKAGE_VERSION" ]]; then
   OVERRIDE_TEST_AGENT_VERSION=${OVERRIDE_AGENT_PACKAGE_VERSION}"-SNAPSHOT"

testing/integration/upgrade_broken_package_test.go

@@ -32,8 +32,6 @@ func TestUpgradeBrokenPackageVersion(t *testing.T) {
 		Sudo:  true,  // requires Agent installation
 	})
 
-	t.Skip("Need to be skip until we have 8.14 first build")
-
 	ctx, cancel := testcontext.WithDeadline(t, context.Background(), time.Now().Add(10*time.Minute))
 	defer cancel()