Add CI minimal CI test for old sympy

9 jobs for prehistoric-sympy in 4 minutes and 12 seconds (queued for 4 seconds)
Name Stage Failure
tests-and-coverage Test
11.59s call     pystencils_tests/
10.89s call pystencils_tests/
10.87s call pystencils_tests/
====== 1 failed, 268 passed, 5 skipped, 330 warnings in 149.77s (0:02:29) ======
Uploading artifacts...
coverage_report: found 73 matching files
test-report: found 4 matching files

Uploading artifacts to coordinator... ok
id=333814 responseStatus=201 Created token=2yYTrMSg
ERROR: Job failed: exit code 1