[clang-format] Fix aligning with linebreaks

Breaking a string literal or a function calls arguments with
AlignConsecutiveDeclarations or AlignConsecutiveAssignments did misalign
the continued line. E.g.:

void foo() {
  int myVar = 5;
  double x  = 3.14;
  auto str  = "Hello"
            "World";
}

or

void foo() {
  int    myVar = 5;
  double x = 3.14;
  auto   str = "Hello"
             "World";
}

Differential Revision: https://reviews.llvm.org/D98214