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/Best Practices/Magic Constants/JapaneseEraDate.ql

@@ -42,7 +42,6 @@ predicate eraDate(int year, int month, int day) {
   year = 2019 and month = 5 and day = 1
 }
 
-
 predicate badStructInitialization(Element target, string message) {
   exists(
     StructLikeClass s, YearFieldAccess year, MonthFieldAccess month, DayFieldAccess day,

cpp/ql/src/Best Practices/Unused Entities/UnusedStaticVariables.ql

@@ -14,9 +14,7 @@
 import cpp
 
 predicate declarationHasSideEffects(Variable v) {
-  exists(Class c | c = v.getUnspecifiedType() |
-    c.hasConstructor() or c.hasDestructor()
-  )
+  exists(Class c | c = v.getUnspecifiedType() | c.hasConstructor() or c.hasDestructor())
 }
 
 from Variable v