[Chapel Merge] Exclude ChapelSysCTypes from the documentation like other builtins

Branch: refs/heads/main
Revision: 71695ef435b240630a36bc61b935dff2358c1d2d
Author: jabraham17
Link: Exclude ChapelSysCTypes from the documentation like other builtins by jabraham17 · Pull Request #26897 · chapel-lang/chapel · GitHub
Log Message:
Exclude ChapelSysCTypes from the documentation like other builtins (#26897)

Fixes [Bug]: ChapelSysCTypes docs show up in public docs · Issue #26871 · chapel-lang/chapel · GitHub, by making sure
that ChapelSysCTypes is excluded from sphinx as its already included
in the CTypes docs

resolves [Bug]: ChapelSysCTypes docs show up in public docs · Issue #26871 · chapel-lang/chapel · GitHub

[Reviewed by @lydia-duncan]

Compare: Comparing d98bcbc0a427a66d8fceb9a8ba00a62def3a3338...66935b41c78c7e80b61deb56630834f551bc897a · chapel-lang/chapel · GitHub

Diff:
M doc/rst/conf.py
https://github.com/chapel-lang/chapel/pull/26897.diff