fix more badly-templated minter files, with tests
add [CheckSelfDependency]
ensure all plugins are declared as prereqs in the right place

that is:
- all plugins brought in conditionally on config values should be
  runtime-recommends, and develop-requires *in the generated dist*
- all plugins that are unconditionally used should be runtime-requires
  (they are de facto develop-requires in the generated dist via
  the plugin bundle itself)
we currently require 5.13.x -- lower limit so we know when we go over that
more detailed prereq install instructions in CONTRIBUTING
now that we make this an xt/author test, there is no need to put an AUTHOR_TESTING guard inside
we inject an xt/release/clean-namespaces.t - add the prereq to match
assume all files are utf-8 encoded when reading them in
Dist-Zilla-PluginBundle-Author-ETHER-0.032

          - fix some bad templates for files used in the minting profile
          - added [CheckSelfDependency]
          - all prereqs that are used based on config settings are now
            (guaranteed to be) included in the pluginbundle as runtime
            recommendations, as well as injected into the built dist as
            develop requirements (RT#89530)
          - more tweaks to CONTRIBUTING text