[release request] v12.3.0

[leifmadsen]

As the last release was in Sept 2020, could we collect the latest changes and have them released?

[leifmadsen]

e134062 (HEAD -> master, origin/master, origin/HEAD) Merge pull request #973 from markasammut/patch-1
d3e8680 Add Reverse Host parameter
4adebdd Add option to reverse host
fb69b9e MySQL database plugin: allow no password; default Host, User, and Password to undef (#970)
e40ffc7 Merge pull request #969 from leifmadsen/fixup/plugin_instance_format_multi_param
2f2eee2 Update manifests/plugin/virt.pp
258ac55 Update manifests/plugin/virt.pp
36b8f74 Convert plugin_instance_format from Enum to String
60d656a Merge pull request #967 from voxpupuli/revert-965-slabimic-python-module-array-configuration-deploy
a2830d6 Revert "Separation of values for a python plugin array module key"
23adc78 Merge pull request #954 from leifmadsen/lmadsen-drop-quotes-hostname-format
d593fea Merge pull request #965 from Slabimic/slabimic-python-module-array-configuration-deploy
c720224 Spec files modified to fit new python module configuration.
8c95ffa Merge pull request #962 from uvNikita/mcelog/install
8e31698 Install collectd-mcelog package on RedHat
2f52077 Separation of values for a python plugin array module key
5ab718b Drop erroneous double quotes from virt plugin template
6ae9801 Merge pull request #963 from voxpupuli/modulesync
d251ff6 modulesync 4.0.0
3ba5fa1 Merge pull request #960 from VtG242/patch-2
f4d3e76 Merge pull request #961 from voxpupuli/modulesync
aafac42 puppet-lint: autofix
2ae2037 modulesync 3.1.0
d1c782d Merge pull request #959 from mrunge/ovs_stats
34cbd97 Fix dbi query.conf.erg template
7c9cc5b Revert "Add acceptance test for ovs_stats"
4f1a798 Add acceptance test for ovs_stats
ff706d5 Fix already existing tests
365c73d Fix type mismatch for ovs_stats port
f9f2e7d Merge pull request #957 from VtG242/patch-1
03c2c23 Fixup collectd::plugin::protocols tests
e49426a Fix `ignoreselected` typo in protocols.conf.erb
15af15c [blacksmith] Bump version to 12.2.1-rc0

[leifmadsen]

CC: @bastelfreak

[leifmadsen]

Resolved by #977