C++: Autoformat everything

Some files that will change in #1736 have been spared.

    ./build -j4 target/jars/qlformat
    find ql/cpp/ql -name "*.ql"  -print0 | xargs -0 target/jars/qlformat --input
    find ql/cpp/ql -name "*.qll" -print0 | xargs -0 target/jars/qlformat --input
    (cd ql && git checkout 'cpp/ql/src/semmle/code/cpp/ir/implementation/**/*SSA*.qll')
    buildutils-internal/scripts/pr-checks/sync-identical-files.py --latest

cpp/ql/src/Metrics/Functions/FunLinesOfCode.ql

@@ -10,6 +10,7 @@
  * @metricAggregate avg sum max
  * @tags maintainability
  */
+
 import cpp
 
 from Function f