Deprecate --disable-default-metrics and improve deprecation

[sysadmind]

--disable-default-metrics was used to disable all built in collectors and only run queries from the queries.yaml file which is no longer supported. Improver verbiage in queries.yaml file pointing to replacement collector for custom queries.

[SuperQ]

I'm actually trying to keep this, but we're going to move it to the exporter-toolkit package. This way the use is consistent across exporters.