Add proof general tests to CI

[SkySkimmer]

No description provided.

[SkySkimmer]

I get errors in

• make tests:

Test 020_coq-test-definition passed unexpectedly
   PASSED   2/14  020_coq-test-definition (0.303142 sec) at ci/coq-tests.el:203
Test 090_coq-test-regression-Fail passed unexpectedly
   PASSED   9/14  090_coq-test-regression-Fail (0.284647 sec) at ci/coq-tests.el:400
Test 091_coq-test-regression-Fail passed unexpectedly
   PASSED  10/14  091_coq-test-regression-Fail (0.254256 sec) at ci/coq-tests.el:425

• compile-tests:

   FAILED  1/1  cct-change-recompile (3.632111 sec) at runtest.el:84

• simple-tests:

Test test-coq-par-job-needs-compilation-quick condition:
    (error "create files with same time stamp failed")
   FAILED  1/1  test-coq-par-job-needs-compilation-quick (13.129966 sec) at coq-test-par-job-needs-compilation-quick.el:983

cc @Matafou

[Matafou]

Thank you very much for this addition. This is due to the .vo{,s,k} empty files that not generated anymore by rocq compile.