Add test for second diagnostic (newer go version)

Author: owen-mc

go/ql/integration-tests/all-platforms/go/diagnostics/newer-go-version-needed/diagnostics.expected

@@ -0,0 +1,15 @@
+{
+  "internal": false,
+  "markdownMessage": "The version of Go available in the environment is lower than the version specified in the `go.mod` file. [Install a newer version](https://github.com/actions/setup-go#basic)",
+  "severity": "error",
+  "source": {
+    "extractorName": "go",
+    "id": "go/autobuilder/newer-go-version-needed",
+    "name": "Newer Go version needed"
+  },
+  "visibility": {
+    "cliSummaryTable": true,
+    "statusPage": true,
+    "telemetry": true
+  }
+}

go/ql/integration-tests/all-platforms/go/diagnostics/newer-go-version-needed/test.py

@@ -0,0 +1,9 @@
+import sys
+
+from create_database_utils import *
+from diagnostics_test_utils import *
+
+os.environ['LGTM_INDEX_IMPORT_PATH'] = "test"
+run_codeql_database_create([], lang="go", source="work", db=None)
+
+check_diagnostics()

go/ql/integration-tests/all-platforms/go/diagnostics/newer-go-version-needed/work/go.mod

@@ -0,0 +1,3 @@
+go 999.0
+
+module test

go/ql/integration-tests/all-platforms/go/diagnostics/newer-go-version-needed/work/go.sum

@@ -0,0 +1,4 @@
+package test
+
+func Test() {
+}