[Chapel Merge] Remove 3 'writeln' calls from test, 'c_char' is different on arm64

Branch: refs/heads/main
Revision: eed04c9f2cd4e19b740ce4af71b93d2ffbd7f5c6
Author: dlongnecke-cray
Link: Remove 3 'writeln' calls from test, 'c_char' is different on arm64 by dlongnecke-cray · Pull Request #28662 · chapel-lang/chapel · GitHub
Log Message:
Remove 3 'writeln' calls from test, 'c_char' is different on arm64 (#28662)

Fix a nightly test failure. On arm64 the type c_char maps to uint(8)
instead of int(8), so the output of the a writeln call is different.
None of the writelns in the body of the test's export proc are
actually needed, so just remove all of them.

Compare: Comparing d73dddd8695580f09bc21c7a36635469a5e6af6e...fe5d16dc2ec58506b0f465fa1d524c5e171d8039 · chapel-lang/chapel · GitHub

Diff:
M test/interop/C/OpaqueCharAlias.chpl
M test/interop/C/use_OpaqueCharAlias.good
https://github.com/chapel-lang/chapel/pull/28662.diff