This is done in preparation for the next commit where a new FatalError
function is introduced. FatalErrorf follows common convention to append
'f' for functions accepting format arguments.
-BEGIN VERIFY SCRIPT-
sed -i 's/FatalError/FatalErrorf/g' $( git grep -l 'FatalError')
-END VERIFY SCRIPT-
This is a partial backport of core#27861
https://github.com/bitcoin/bitcoin/pull/27861/commits/3fa9094b92c5d37f486b0f8265062d3456796a50
Depends on D18966