Update to clang-format-5 and reformat the codebase 

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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>

re #22143

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re #22143

re #22143

These fixes were not applied by clang-tidy because they are either
inside a macro, not included by any source files or conditionally
compiled on a condition which is false on my OS.

They were found using grep -rnI '^[^/#*]*typedef' Framework/