Update to clang-format-5 and reformat the codebase 

Primarily throwing exceptions rather than logging when there is an error.
This reports better to python, and prevents silent problems.
re #22918

This makes these algorithms consistent with the rest of the code base.

And make use of wavelength parameter in FindPeaksMD and PeaksWorkspace.

Moved code from FindPeaksMD into new method on Goniometer. Then added option onto peaks workspace.

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Merge done to enable documentation be be fixed, because of removal of
alias directive and addition of related algorithms directive.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>

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