Name argument if data conversion fails in std.getopt

[burner]

Fixes #9662

revival of #3491 as the suggested "better" solution never happened

[dlang-bot]

Thanks for your pull request, @burner!

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Testing this PR locally

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dub run digger -- build "master + phobos#10593"

[thewilsonator]

Enforce whitespace before opening parenthesis
grep -nrE "\<(for|foreach|foreach_reverse|if|while|switch|catch|version)\(" $(find etc std -name '*.d') ; test $? -eq 1
std/getopt.d:622:    catch(ConvException e)
std/getopt.d:2006:    catch(GetOptException e)
std/getopt.d:2028:    catch(GetOptException e)

[burner]

@thewilsonator thank you

[thewilsonator]

Looks like this breaks tsv-utils with the change of exception type. cc @jondegenhardt

[thewilsonator]

eBay/tsv-utils#360