Add .lgtm.yml to control how Gradle is built by LGTM.com

LGTM.com passively executes the Gradle/Gradle build to do CodeQL database building.
This file allows us to control how that is built

.editorconfig

@@ -19,5 +19,8 @@ insert_final_newline = true
 [*.md]
 trim_trailing_whitespace = false
 
+[*.yml]
+indent_size = 2
+
 [gradle/verification-metadata.xml]
 indent_size = 3

.lgtm.yml

@@ -0,0 +1,9 @@
+# This is used to configure the LGTM.com website's build of Gradle/Gradle
+# This happens passively without any explict configuration against our repository.
+# See: https://lgtm.com/projects/g/gradle/gradle
+
+extraction:
+  java:
+    index:
+      java_version: "11"
+      build_command: ./gradlew --init-script .github/workflows/codeql-analysis.init.gradle -S -Dorg.gradle.java.home=/usr/lib/jvm/java-11-openjdk-amd64 --max-workers=1 --no-scan testClasses