fallback to ext_pillar in pillar match if there is no pillar in __opts__

[vquie]

What does this PR do?

If there is 'pillar' in __opts__ the matchers would break. This PR determines if there is a 'pillar' object and uses 'ext_pillar' if there is none.

What issues does this PR fix or reference?

#52567

Previous Behavior

Previously the matcher would just call __opts__['pillar'].

New Behavior

The matcher checks for __opts__['pillar']. If there is none, it calls __opts__['ext_pillar'] instead.

Tests written?

No

Commits signed with GPG?

No

[codecov]

Codecov Report

Merging #55624 into master will increase coverage by 1.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #55624      +/-   ##
==========================================
+ Coverage    17.7%   18.79%   +1.09%     
==========================================
  Files         784      817      +33     
  Lines      168394   175189    +6795     
  Branches    36188    37590    +1402     
==========================================
+ Hits        29805    32913    +3108     
- Misses     136569   139704    +3135     
- Partials     2020     2572     +552

Flag	Coverage Δ
#archlts	18.07% <ø> (+0.37%)	⬆️
#centos7	23.64% <ø> (?)
#proxy	23.68% <ø> (?)
#py2	18.57% <ø> (?)
#py3	18.42% <ø> (+0.72%)	⬆️
#runtests	18.79% <ø> (+1.09%)	⬆️
#ubuntu1604	23.63% <ø> (?)
#zeromq	18.79% <ø> (+1.09%)	⬆️

Impacted Files	Coverage Δ
salt/modules/glusterfs.py	12.18% <0%> (-0.03%)	⬇️
salt/modules/nspawn.py	17.43% <0%> (-0.03%)	⬇️
salt/utils/dns.py	18.36% <0%> (-0.03%)	⬇️
salt/modules/azurearm_network.py	8.7% <0%> (-0.02%)	⬇️
salt/modules/win_lgpo.py	6.56% <0%> (ø)	⬇️
salt/modules/boto_elasticache.py	9.95% <0%> (ø)	⬆️
salt/modules/boto3_route53.py	9.93% <0%> (ø)	⬆️
salt/utils/zeromq.py	48% <0%> (ø)	⬆️
salt/utils/configparser.py	14.19% <0%> (ø)	⬆️
salt/modules/win_file.py	16.67% <0%> (ø)	⬆️
... and 153 more

[dwoz]

re-run full centos