Runs clang-tidy pass by ref across the codebase to fix-up various
warnings we are seeing in cppcheck

Also updated class_maker.py

This commit replaces all header guards in LiveData with #pragma once

Bumps the version of GTest to 1.10.0, removes the previous patching
steps, which are no longer needed. Removes the extra handling which is
provided in upstreams CMake, such as managing include directories

Created incorrect boundaries when event count was low to moderate but
most events fell on a single detector.

When subscription to the topic that provides the spectrum to detector ID
mapping fails or the message is otherwise not consumed generate a 1:1
mapping by loading the instrument before creating the buffers.

This is a slightly hacky solution in time for V20 beam time, the
spectrum to detector ID mapping may be later moved to the run start
message, making this easier to handle.

Fixes #26692

When subscription to the topic that provides the spectrum to detector ID
mapping fails or the message is otherwise not consumed generate a 1:1
mapping by loading the instrument before creating the buffers.

This is a slightly hacky solution in time for V20 beam time, the
spectrum to detector ID mapping may be later moved to the run start
message, making this easier to handle.

Fixes #26692

This test ensures that the Kafka event decoder returns correct ToF
values for a known message.

This is based on the prototype derived from the meeting at the DMSC last December.

The workflow is as follows:
  - Pool all events received from the Kafka stream into a single buffer
  - When the buffer is to be flushed (i.e. events populated in the EventWorkspace):
    - Parallel sort the event buffer by the detector ID/workspace index
    - Determine group boundaries
    - Parallel insert events into EventWorkspace

Also included is the optimisation of using a spec to ID mapping based on
a vector rather than map.
This provides better performance during the initial event buffering
(where this lookup is made).

Initial benchamrking shows 25M events is a intermediate buffer threshold
for LOKI (9 banks) at 10^7 events per second.
This manages to maintain well over 14Hz pulse rate (with no post
processing).

This was replaced wholesale recently but missed in a new file
that was created and merged after the changes.

The instrument/IDFs_for_UNIT_TESTING directory was renamed to instrument/unit_testing, as it now contains nexus as well as IDF files.
All the paths in the source were changed accordingly.

The SMALLFAKE_example_geometry.hdf5 was moved from the build ExternalData to instrument/unit_testing.

The LOKI_Definition.hdf5,SANS2D_Definition_Tubes.hdf5,WISH_Definition_10Panels.hdf5 files were moved
from the build ExternalData to instrument/unit_testing.

Update copyright headers in all files

Squashed commit of the following:

* First version of a script to manage copyright statements

re #23468

* Neatened up script, added comments

re #23488

* move script to tools directory

re #23488

* small script changes and a couple of manual file changes

re #23488

* Minor chnage to whitespace detection in regex

re #23488

* Add an excluded directory

re #23488

* remove a repeasted copyright statement in a file

re #23488

* Don't comsume the comment end if it is on the same line

re #23488

* fix error in new copright parsing

re #23488

* remove double copyrifght entry

re #23488

* Improve handling of old copyrights at the start of comments

re #23488

* remove empty comments re #23488

* exclude gsoapgenerated directories

re #23488

* Sort out greedy line matching re #23488

* improve empty comment removal

re #23488

* improve false positives

re #23488

* impressive speedup by limiting regex matching length

re #23488

* remove evil invisible non ascii character

Also upadte the copyright at the same time

re #23488

* resolve multiple copyrights in a single file

re #23488

* resolve an issue with new statement detection

re #23488

* another unprintable unicode character

re #23488

* pep updates and cmake the new copyright fit clang format

re #23488

* update already done new format headers

re #23488

* wrong type of bracket

re #23488

* Update class_maker and friends

re #23488

* Update all copyright statements

re #23488

* clang format re #23488

* flake8 warnings re #23488

* Flake8 warnings re #23488

* Exclude .cmake.in and rb.in files

re #23488

* replace missing line re #23488

* exclude .py.in files as they are flasely recognized as C++

re #23488

* another setp.py.in re #23488

* another .py.in correction re #23488

* Hopefully the last of the .py.in files re #23488

* resolve utf-8 encoding of python files and changed ABINS checksum

re #23488

* updates to unit tests that reference line numbers

re #23488

* remaining unit test files and other fixes

re #23488

This was a behavior introduced in #22425 to solve a problem with data
that wasn't being binned during the processing step. This changes it to
rebin only if it hadn't been during the processing.

This commit fixes the possibility of a bad cast between a group and non-group workspace

Re #23230

Update to clang-format-5 and reformat the codebase