Fix nil pointer dereference when telemetry is disabled

Restore original inPlugin behavior

Try to fix log files

Change version suffix to -mpl

Transform packer into a library

Adapt to 1.9.4 (which is still MPL licensed)

Signed-off-by: Simao Gomes Viana <simao.gomes@toowoxx.de>

Merge pull request hashicorp#12600 from hashicorp/backport/bump_go/un…

…iformly-classic-yeti

This pull request was automerged via backport-assistant

Transform packer into a library

Signed-off-by: Simao Gomes Viana <simao.gomes@toowoxx.de>

cut release 1.8.4

Transform packer into a library

Signed-off-by: Simao Gomes Viana <simao.gomes@toowoxx.de>

Cut release 1.8.3

* Fix spacing in CHANGELOG
* Add release date to CHANGELOG