Java/Kotlin: Add Diagnostics.qll
Java/Kotlin: Add Diagnostics.qll

github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql