* Delete RooCintUtils.h and RooCintUtils.cxx

I know this is not a small change, so any comments are welcome!

Background:
RooCintUtils was providing a wrapper between Cint and roofit. This implementation is very old, and is
using Cint iteration interface a lot. Recently we were trying to kill
RooCintUtils code where its using iteration and to change them to new
Cling interface in order to improve the performance.

RooCintUtils is an utility class, so this is internal namespace which is only used inside roofit.
Since there are just 3 methods left, this RooCintUtils is no longer
worth spending a file. Let's delete this and migrate methods to
RooFactoryWSTool.

* Put routines into anonymous namespace and made static

This causes havoc if people (like DD4HEP) have using namespace std:: and define a detail namespace themselves.
Instead, declare the std::detail:: entities in ROOT::Detail.

There files were not using RooCintUtils.h which is an implementation for
old interpreter.

Using unary operator address of (eg. MyClass m; &m) takes into account
overloaded operators which may not give us the precide address of the
allocated storage.

This patch teaches cling to use std::addressof instead.

The cmake lists are semicolon-separated strings which we fail to pass
to the colon-expecting interface.

This reverts commit 16b0a0b8.

The error seems to be fixed but we forgot to update the test.

In python 3 'term_width / min_element_width' is a float and can't be passed to
range a few lines below.

This allows to distinguish collection with a custom operator from those with a
default operator.  This is relevant in particular to know if shortcuts are available
or not for vector

Wile changed his mind and asked to remove the author name (with was useless anyway as it was anonymous).

This reverts commit f1904f70.
Added test does not compile.

* add string concatenation for all integer/float types

* update floating point types

* switch to template `type_traits` for type detection

* add numeral type checking for string concatenation
- improves detection of `signed`, `unsigned`, and `float` types and does
not interfere with `char` implementation even though it is of `signed`
type
- adds three type_traits

* add return-type SFINAE constriants and split declaration and definition

* move new type traits into ROOT::TypeTraits namespace

* new test for v7 text

* typo

Temporary returned by sys.GetName() was being used past its lifetime.

test is the getters work.

Implement the Text Size
new ctor with the text position
typo

this is a step towards supporting access of leaves in jitted code.
The functionality added allows to alias a leaf called branchname.leafname
in order to use the alias in jitted strings.

This commit fixes ROOT-9268 and part 1 of ROOT-9142.