Paraview Purge as part of Qt4 Removal

This is the first round that enforces ENABLE_MANTIDPLOT=off for
everybody and removes the source code.

This is the first round that enforces ENABLE_MANTIDPLOT=off for
everybody and removes the source code.

This is the first round that enforces ENABLE_MANTIDPLOT=off for
everybody and removes the source code.

Also remove most of FRAMEWORK_ONLY_BUILD

Makes MantidPlot opt-in for new CMake generations. At the point of
writing the CI jobs have been building with MantidPlot disabled fine for
a while.

Make it so that any new CMake build directories have it off by default,
so people can opt-in if they really need it. Note this does not impact
existing CMakeCaches, so someone with Plot on will continue to have it
on.

Gigg, Martyn Anthony authored Nov 25, 2020 and Peterson, Peter committed Dec 07, 2020

This allows a package build to only include
workbench/mantidplot depending on the cmake
flags that are set.

This reduces the payload of Framework. Caveats:
* Implementation is not idea. Firstly, libaries should be managed by
list which would make it easier to harmoise enable sub-directories and
libraries making up the Framework target. Also in the top level cmake,
the enabling and checking could be refactored to a common function given
that it is reasonably generic
* I am probably throwing out more than would be accepted

This allows a package build to only include
workbench/mantidplot depending on the cmake
flags that are set.

The tests are currently minimal and could be extended
but the class would benefit from an abstraction to
the ConfigService so it doesn't depend on its state

Also sets Sphinx as a requirement if the developer
asks for docs to be built as it's better to fail
early

Also sets Sphinx as a requirement if the developer
asks for docs to be built as it's better to fail
early

Ensures that if MantidPlot is disabled then the macOS
package only contains the MantidWorkbench bundle

On Linux, the starting scripts launch_mantidplot.sh and
launch_mantidworkbench.sh uses the custom allocator Jemalloc via
LD_PRELAOD to better manage the memory (especially the release of the
memory). This commit modifies the creation of those scripts, which is
managed at the CMake step, accordingly.

The minimum is set to Python 3.6 so this can be assumed

On Windows, even though certain things are cached, running
these finders multiple times is costly. Put everything
at the top level. Our current CMake structure does not really
offer options fine-grained control of enabled components
so there is no benefit to the finders being in multiple
places.

It can find all components in one shot and offers
import targets over the traditional global variable
approach.

Adds boost-python to public interface of PythonInterfaceCore
Removes the need for each library to link to it by hand and
it only needs to be found once.

FindPython3 now comes with the ability to find Numpy
so that we can drop some of our finder code

Adds handling for multiple sanitizers using a multi option.

This includes:
- Warning users if they try to use a sanitizer on release builds
- Changing the optimization flag of RelWithDebInfo to get stack traces
- Adding more checks in case someone mis-types
- Adding option for clangs memory sanitizer though this throws an error
  at the moment

Adds the Python library TOML to the required packages list for RHEL /
Debian / Mac. Additionally, it bumps the SHA for MSVC deps to a version
with the required files

Refs #26493