[opentelemetry-php-contrib] Create Symfony DebugBundle

[tidal]

trafficstars

The DebugBundle should enhance the Symfony Profiler with a view of telemetry data collected by opentelemetry-php. Custom data-collectors and profiler templates need to be created for this to work.

[stale[bot]]

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[jdalmas]

I've try something in this PR https://github.com/open-telemetry/opentelemetry-php-contrib/pull/74 . Like I say, I've put profiling logic into OtelSdkBundle instead of DebugBundle. I don't know if it's wrong or not.

[bobstrecansky]

@jdalmas - would you like us to merge this?

[jdalmas]

@jdalmas - would you like us to merge this?

@bobstrecansky I've updated PR to use Instrumentation Interface & Trait. I you think this PR is ok, you can merge it.