.clang-format: Set ColumnLimit to 0

This disables adding/removing line breaks by `clang-format`, as this
could very well introduce regressions in code formatting in terms of
our coding convention: If a long array was matching the soft limit of 80
chars per line, `clang-format` would reflow it to match the hard limit
of 100 chars.

One can selectively disable `clang-format` with magic comments. But at
this point, I'd say we should rather disable this feature until we
can configure it in a way to match our coding convention better (without
having to add magic comments).

Author: maribu

.clang-format

@@ -57,7 +57,7 @@ BreakConstructorInitializersBeforeComma: false
 BreakConstructorInitializers: BeforeComma
 BreakAfterJavaFieldAnnotations: false
 BreakStringLiterals: false
-ColumnLimit: 100
+ColumnLimit: 0
 CommentPragmas: '^ IWYU pragma:'
 CompactNamespaces: false
 ConstructorInitializerAllOnOneLineOrOnePerLine: false