[BUG] Wrong module function results in confusing KeyError

Description
onlyif doesn't accept zfs.filesystem_absent module

Setup

State:

{{ jailname }}_oncourse-template-snapshot:
  cmd.run:
    - name: fetch https://xyz.com/repository/zfs/oncourse-{{ jail.version }}.bz2 -o - | bzcat | zfs recv -F tank/jails/templates/oncourse-{{ jail.version }}
    - onlyif:
      - fun: zfs.filesystem_absent
        name: {{ zfs_pool }}/jails/templates/oncourse-{{ jail.version }}@{{ jail.version }}

output:

          ID: yc_oncourse-template-snapshot
    Function: cmd.run
        Name: fetch https://xyz.com/repository/zfs/oncourse-28.bz2 -o - | bzcat | zfs recv -F tank/jails/templates/oncourse-28
      Result: False
     Comment: An exception occurred in this state: Traceback (most recent call last):
                File "/usr/local/lib/python3.7/site-packages/salt/state.py", line 2118, in call
                  ret.update(self._run_check(low))
                File "/usr/local/lib/python3.7/site-packages/salt/state.py", line 890, in _run_check
                  _ret = self._run_check_onlyif(low_data, cmd_opts)
                File "/usr/local/lib/python3.7/site-packages/salt/state.py", line 963, in _run_check_onlyif
                  result = self._run_check_function(entry)
                File "/usr/local/lib/python3.7/site-packages/salt/state.py", line 921, in _run_check_function
                  return self.functions[fun](*cdata["args"], **cdata["kwargs"])
                File "/usr/local/lib/python3.7/site-packages/salt/loader.py", line 1278, in __getitem__
                  func = super(LazyLoader, self).__getitem__(item)
                File "/usr/local/lib/python3.7/site-packages/salt/utils/lazy.py", line 108, in __getitem__
                  raise KeyError(key)
              KeyError: 'zfs.filesystem_absent'

Versions Report

# salt --versions-report
Salt Version:
           Salt: 3001

Dependency Versions:
           cffi: 1.14.0
       cherrypy: Not Installed
       dateutil: 2.8.1
      docker-py: Not Installed
          gitdb: Not Installed
      gitpython: Not Installed
         Jinja2: 2.11.2
        libgit2: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.6.2
   mysql-python: 1.4.6
      pycparser: 2.20
       pycrypto: 2.6.1
   pycryptodome: 3.9.7
         pygit2: Not Installed
         Python: 3.7.7 (default, Jun 22 2020, 07:58:14)
   python-gnupg: Not Installed
         PyYAML: 5.3.1
          PyZMQ: 19.0.1
          smmap: Not Installed
        timelib: Not Installed
        Tornado: 4.5.3
            ZMQ: 4.3.1

System Versions:
           dist: freebsd 12.1
         locale: UTF-8
        machine: amd64
        release: 12.1-RELEASE-p1
         system: FreeBSD
        version: FreeBSD 12.1