Add opentelemetry instrumentation

[hamersaw]

TL;DR

Adding a new telemetryutils package that adapts the opentelemetry functionality for use in Flyte repos. This includes support for multiple TracerProviders allowing logical partitioning of tracers within single binary. Also instruments the blobstore and provides a wrapper for instrumenting k8s client.

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

^^^

Tracking Issue

flyteorg/flyte#3304

Follow-up issue

NA

[codecov]

Codecov Report

Merging #146 (9cbeef9) into master (3322b07) will decrease coverage by 1.44%.
The diff coverage is 40.20%.

@@ Coverage Diff @@## master #146 +/- ##
==========================================
- Coverage 68.18% 66.75% -1.44% 
==========================================
Files 69 73 +4 Lines 4083 4268 +185 ==========================================
+ Hits 2784 2849 +65 - Misses 1141 1249 +108 - Partials 158 170 +12 

Flag	Coverage Δ
unittests	66.75% <40.20%> (-1.44%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cli/pflags/api/namedtype_enumer.go	0.00% <ø> (ø)
storage/config.go	66.66% <ø> (ø)
storage/storage.go	100.00% <ø> (ø)
storage/utils.go	65.00% <0.00%> (-5.28%)	⬇️
telemetryutils/config.go	0.00% <0.00%> (ø)
telemetryutils/k8s.go	0.00% <0.00%> (ø)
telemetryutils/config_flags.go	25.00% <25.00%> (ø)
storage/stow_store.go	75.70% <31.81%> (-3.85%)	⬇️
telemetryutils/factory.go	64.51% <64.51%> (ø)
storage/mem_store.go	82.00% <81.81%> (-0.93%)	⬇️
... and 3 more

... and 1 file with indirect coverage changes

[hamersaw]

closed in favor of #149

[kumare3]

Does it also change are
Dependency from Prometheus to
Open telemetry? Should we