Add the latest batch of issues

[jmid]

This little PR adds the latest 3 issues

• the Out_channel regression
• the failure to build dune on trunk
• the abort regression on failure to create domain

[jmid]

CI summary:

• Bytecode trunk unexpectedly found a counterexample for the Lin.Internal Thread int Clist test Lin.Internal Thread int CList test finds unexpected counterexample under bytecode #358
• Cygwin trunk timed out during the Lin Dynlink test [ocaml5-issue] Deadlock in Dynlink test on Cygwin+MinGW+MSVC #307
• MinGW 5.2 failed after 46m - but the CI log indicates that it is somehow still running!
• macOS trunk failed to build dune [dune-issue] dune fails build under trunk/5.3 on macOS #433
• freebsd-amd64-5.1 failed to trigger a Lin Out_channel counterexample Lin Out_channel test fails to trigger on FreeBSD #401

Out of 44 workflows 5 failed with 2 genuine errors, 2 false alarms, and 1 CI issue

[jmid]

CI summary for merge to main:

• Bytecode trunk unexpectedly found a counterexample for Lin.Internal CList int test with Thread Lin.Internal Thread int CList test finds unexpected counterexample under bytecode #358
• MinGW 5.1 timed out during threadomain [ocaml5-issue] Windows failures on threadomain #203
• macOS trunk failed to build dune [dune-issue] dune fails build under trunk/5.3 on macOS #433
• freebsd-amd64-5.1 failed to trigger a Lin Out_channel counterexample Lin Out_channel test fails to trigger on FreeBSD #401

Out of 45 workflows 4 failed with 2 genuine errors and 2 false alarms