Updates the HDF5 URL to the new one. Using browsers or wget would
correctly redirect the request to the new URL, whilst sphinx would get a
HTTP 403 instead.

Updating this URL should fix the sphinx warning, restoring the master
incremental and clean builds to stable (hopefully)

Dan's requested fixes

Co-Authored-By: Harrietbrown <49688535+Harrietbrown@users.noreply.github.com>

Bumps the minimum CMake version to 3.13, this allows us to use
add_link_options on address sanitizers.
At the time of this commit 3.14 is available for RHEL7, and 3.15 for
Ubuntu. Windows requires 3.15 so in an ideal world we would just set our
minimum to that, but as it's not fully available we settle for the
earlier version at the moment.

ClassTypeParameter and the list variant emulated an enumeration from pre
Python 2.6. Since we have converted to the native enum type we can now
drop the custom wrapper, as no instances are using it.

This commit adds new unscripted testing instructions for the new ISIS
Reflectometry interface. This is based on the instructions for the old
version of the interface from the wiki but updated for the differences
in the new interface.

One of the old methods to produce an unexpected exception and an Error report pop-up no longer worked and this has been replaced. Also included is a link to the Training Course Data for the file in the new method.

We have been using DragNDrop packages on macOS for some time
and this just requires `cp` and not the use of `installer`.

Adds instructions to brew unlink the qt4 installation and
perform some extra setup on the developer machine. This is not
the most elegant solution but requires the least amount of code
changes in our CMake.

Converts SANSEventSlice from a workflow algorithm into a class. As this
includes the removal of previous workflow algs, we can also remove the
serialized state lines too confirming that all algs have been converted

Removes the missed remaining calls to SANSMaskWorkspace

Fixes up the copyright year, a missing param and moves a comment about
enums next to the enum

Removes the SANSCreateAdjustmentWorkspace and
SANSCreateWavelengthAndPixelAdjustment workflow algorithms and replaces
them with Python classes.
This is part of the epic fixing ISIS SANS history

Removes SANS Create Adjustment algorithm by converting it into a Python
class, as part of the SANS History fix