[Fix] distributed tracing reporting for Go and PHP

[adammarshallNR]

Added the keys for DT reported by Go and PHP and changed the feature check function to check if featuresList is an array, then loops through, if not, proceeds as before.

It appears Logs in Context isn't reporting properly in some cases too, so I will keep working to fix that as well, building on this (assuming this is ok).

My first fix and PR apologies for any issues!!

[CLAassistant]

All committers have signed the CLA.

[amit-y]

👋 @adammarshallNR - Thanks for putting in this PR. My apologies for the delay in getting it reviewed!

We use the AngularJS style of commit messages. The build process relies on that, and so if you could get the recommended changes in, with that style of commit message, that would be great!