Abstract tracer and create an internal one for test purposes

[cochicde]

This PR is part a branch with some other things, so some things are still not used here.
The folllowing was done here:

• Abstract tracer: any mention of the barectf tracer was removed from the main code and hidden in BarectfPlatformFORTE. To do that, a CForteTracer typedef was created which can be set to other tracers during compilation time. BarectfPlatformFORTE (and others tracers) have methods such as traceInstanceData, traceReceiveInputEvent, etc. which mirror the ones from barectf. The Function Blocks then call these methods in CForteTracer class.
• Internal tracer: Is a tracer that instead of tracing into a file, it traces into a vector of EventMessage which contains the same information as the barectf traces. This is only compile if the tracer tests are enabled.
• Flexible Tracer: A shell over both BarectfPlatformFORTE and the internal tracer, which allows selecting one or the other during runtime. This is the default tracer if tracer tests are enabled.
• Babeltrace2 Message Factory: everything related to babeltrace2 was moved out of the EventMessages and this factory allows creating EventMessages from the bt_field (and other) types defined by babeltrace2.

The main idea of this new code is to be able generate traces using barectf but also directly into memory and be able to have the same class to compare them (EventMessage)

[diplfranzhoepfinger]

we have a Tracer ?
@azoitl
this would be VERY helpful.
such a Thing which X/Y Coordinates and writing Diagramms of Variables ?
I am Impressed !

[azoitl]

we have a Tracer ? @azoitl this would be VERY helpful. such a Thing which X/Y Coordinates and writing Diagramms of Variables ? I am Impressed !

I don't think this is what you can to with that. Currently tracing is more for getting deeper insights on what is going on. But it heavily impacts performance and is not suitable for non-linux platforms.

[diplfranzhoepfinger]

ahhhhhhhhhhhhhhhh ....

so this would be a totally different thing:
having a Chart Draw module in IDE, to make Plots during a Watch ?

[mx990]

Suggested change

	class CFlexibelTracer final {
	class CFlexibleTracer final {

[cochicde]

are you sure?
https://www.merriam-webster.com/dictionary/flexibel?utm_campaign=sd&utm_medium=serp&utm_source=jsonld

[mx990]

Yes, when I click the link you posted, I get:

The word you've entered isn't in the dictionary.

It even suggests the correct spelling: https://www.merriam-webster.com/dictionary/flexible

[cochicde]

Apparently I was very tired

[azoitl]

ahhhhhhhhhhhhhhhh ....

so this would be a totally different thing: having a Chart Draw module in IDE, to make Plots during a Watch ?

yes