job_manager/create: add cache_size limit

5 jobs for resource-control in 1 minute and 16 seconds (queued for 7 seconds)
latest
Status Job ID Name Coverage
  Test
passed #184798
amd64 linux docker
test:flake8

00:00:21

passed #184797
amd64 linux docker
test:mypy

00:00:24

passed #184799
amd64 linux docker
test:pylint

00:00:36

passed #184800
amd64 linux docker
test:pytest

00:00:20

passed #184801
amd64 linux docker
test:respdiff

00:01:15