HPCC-10665 Add missing params to File.copy docs

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
HPCC-10665 Edits based on review feedback

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
HPCC-10665 Fix typo found in review

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
Merge pull request #5317 from JamesDeFabia/10665_File.copy_docs_missing_params

HPCC-10665 Add missing params to File.copy docs

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>