[Chapel Merge] Move ChapelIO to a standard module

Branch: refs/heads/master
Revision: b6336ba
Author: mppf
Log Message:

Merge pull request #16849 from mppf/chapelio-standard

Move ChapelIO to a standard module

This PR moves modules/internal/ChapelIO.chpl to
modules/standard/ChapelIO.chpl and updates the documentation to list it
as one of the Automatic standard modules.

  • [x] full local testing

Reviewed by @lydia-duncan - thanks!

Modified Files:
A modules/standard/ChapelIO.chpl
R modules/internal/ChapelIO.chpl
M compiler/passes/scopeResolve.cpp
M doc/rst/meta/modules/standard.rst
M modules/Makefile
M modules/internal/fixInternalDocs.sh
M test/compflags/diten/printCallGraph.good
M test/functions/deitz/test_write_type_error.good
M test/modules/bradc/printModStuff/foo.good

Compare: https://github.com/chapel-lang/chapel/compare/286e0f33ddc1...b6336ba2b069