update otel libs from v0.13.0 -> v0.20.0

[aaron-prindle]

What is the problem being solved?
Part of #5756, adding opentelemetry trace information to skaffold commands. Updating out libs to the latest otel version adds additional useful functionality for tracing.

Why is this the best approach?
This approach uses go mod (updated via "go get ") and minor API changes to our otel API usage for the update.

What other approaches did you consider?
N/A

What side effects will this approach have?
There shouldn't be any side effects w/ this approach, the changes to otel's API were renaming/moving things (packages, functions, etc.). The only option removed was stdout Quantile aggregation (stdout.WithQuantiles) but I do not think this will have side effects. See open-telemetry/opentelemetry-go@49f699d#diff-2b283a7fb9f9b66e31a2b51a9ae9cad3599650a633f02fea9a956c4f6a714c6c

What future work remains to be done?
N/A

[tejal29]

Looks like these 3rd party libs need to be in the 3rd party import block

[aaron-prindle]

Thanks! This is fixed now using gci tool

[codecov]

Codecov Report

Merging #5757 (e3d2d9d) into master (11a27cb) will decrease coverage by 0.20%.
The diff coverage is 93.10%.

@@            Coverage Diff             @@
##           master    #5757      +/-   ##
==========================================
- Coverage   70.87%   70.67%   -0.21%     
==========================================
  Files         421      423       +2     
  Lines       16091    16165      +74     
==========================================
+ Hits        11405    11425      +20     
- Misses       3850     3900      +50     
- Partials      836      840       +4     

Impacted Files	Coverage Δ
pkg/skaffold/instrumentation/export.go	73.10% <93.10%> (ø)
pkg/skaffold/kubernetes/log.go	47.41% <0.00%> (ø)
pkg/skaffold/schema/versions.go	82.41% <0.00%> (ø)
pkg/skaffold/kubernetes/colorpicker.go	100.00% <0.00%> (ø)
pkg/skaffold/schema/v2beta15/config.go	20.58% <0.00%> (ø)
pkg/skaffold/schema/v2beta15/upgrade.go	100.00% <0.00%> (ø)
pkg/skaffold/tag/util.go	90.90% <0.00%> (+1.43%)	⬆️

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[briandealwis]

Can you verify with SKAFFOLD_EXPORT_TO_STDOUT whether the quantiles is equivalent? Or that it's ingested appropriately with Cloud Monitoring?

[aaron-prindle]

The Quantile piece is only used for the stdout exporter (only used locally via env var SKAFFOLD_EXPORT_TO_STDOUT) which is not used in data export/ingestion for Cloud Monitoring. The way quantiles were used w/ the stdout exporter was not relevant to our logging setup (they were looked at in test but the quantile information was used similarly to value information in the test, no real quantile usage). This will have no import on data export/ingestion, metrics will still work as expected. I have verified that this setup still works as expected pointing this at my own project aprindle-metrics-test and firing metrics there: