eval-pr: provide more instructions for autogame and multiple runs

[jwrober]

Closes #1220
Closes #1012

[lmoureaux]

#1012 says:

There is also a codeFactor issue around this code block

 if ! [[ -e build_$pull_request ]]; then
   mkdir build_$pull_request
   cd build_$pull_request
   cmake --preset ASan -S ..
   cd ..
 fi

codeFactor wants this to run in a sub-process do loop. It should be fixed at the same time.

I don't think this is fixed in this PR.

[jwrober]

The MacOS failure seems unrelated. Some issue with gettext.

[lmoureaux]

Agreed

[lmoureaux]

Running the ASAN build after a normal build, I get the following:

-- Applying the .diff via patch.

patching file server/unithand.cpp
Reversed (or previously applied) patch detected!  Assume -R? [n]