Added --status option for art:build-info promote

[perseoGI]

Following build-promotion documentation, we can see that effectively, if you create a build-info with a comment but no status is added, the promotion history won't be tracked.

Demo

Following this steps,

$ conan new cmake_exe -d name="myapp" -d version=1.0
$ conan create . --format json > graph.json
$ conan art:build-info create graph.json mybuildname 1 dev --server myartifactory > mybuildname.json
$ conan art:build-info upload mybuildname.json --server myartifactory
$ conan art:build-info promote mybuildname 1 dev prod --server myartifactory --comment "All good"

will result in:

But, with this new option,

$ conan art:build-info promote mybuildname 1 dev prod --server myartifactory --comment "All good" --status "My Status"

Fix #216

[CLAassistant]

All committers have signed the CLA.