OpenTelemetry migration

[mantzas]

Which problem is this PR solving?

Resolves #434.

Short description of the changes

• Introduced a observability package

[codecov]

Codecov Report

Attention: Patch coverage is 77.91563% with 89 lines in your changes missing coverage. Please review.

Project coverage is 85.16%. Comparing base (0a8d9cb) to head (1600e6c).
Report is 1 commits behind head on master.

Files	Patch %	Lines
component/amqp/component.go	50.00%	10 Missing and 2 partials ⚠️
component/kafka/component.go	65.62%	11 Missing ⚠️
observability/observability.go	68.75%	7 Missing and 3 partials ⚠️
client/mqtt/publisher.go	65.21%	8 Missing ⚠️
client/amqp/amqp.go	69.56%	7 Missing ⚠️
observability/metric/meter.go	66.66%	4 Missing and 2 partials ⚠️
client/kafka/sync_producer.go	66.66%	5 Missing ⚠️
client/kafka/kafka.go	77.77%	4 Missing ⚠️
client/redis/redis.go	42.85%	2 Missing and 2 partials ⚠️
component/sqs/component.go	69.23%	4 Missing ⚠️
... and 10 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #685      +/-   ##
==========================================
+ Coverage   79.49%   85.16%   +5.67%     
==========================================
  Files          68       60       -8     
  Lines        4067     3317     -750     
==========================================
- Hits         3233     2825     -408     
+ Misses        682      361     -321     
+ Partials      152      131      -21     

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