feat: helm autodiscovery handles digest

[olblak]

Similar pullrequest than #1931

Now by default the Helm autodiscovery plugin will insert a digest for container update unless the parameter digest is set to false.
This feature now allows the following update

updatecli/updatecli:latest to updatecli/updatecli:latest@sha256xxxx
updatecli/updatecli:0.23.0 to updatecli/updatecli:0.73.0@sha256xxx
updatecli/updatecli:0.73.0@sha256xxx to updatecli/updatecli:0.73.0@sha256yyy

I also took the opportunity to update the generated template for using conventional commits messages like

deps(helm): bump image "updatecli/updatecli" digest for chart "sample"

Test

To test this pull request, you can run the following commands:

cd pkg/plugins/autodiscovery/helm
go test
go build -o bin/updatecli .
./bin/updatecli diff --config e2e/updatecli.d/success.d/autodiscovery/helm

Additional Information

Tradeoff

Potential improvement