The rule exists primarily for when using capture default
by copy "[=]", since member variables will be captured by
reference, which is against developer expectations.
However when the capture default is by reference, then there
is no doubt: everything will be captured by reference. Add
an option to allow just that.
Note: Release Notes do not need update since this check
has been introduced in the current WIP release.
A ticket has been opened at the C++ Core Guidelines repo
to consider updating the rule such that this behavior
is the default one: