[Golang] Add Integration Package with heap Data Stream

[niraj-crest]

• Enhancement

What does this PR do?

• Added 1 data stream (Heap metrics).
• Added data collection logic for the data streams.
• Added the ingest pipeline for the data streams.
• Mapped fields according to the ECS schema and added Fields metadata in the appropriate yaml files.
• Added dashboards and visualizations.
• Added system test cases for the data stream.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

How to test this PR locally

• Clone integrations repo.
• Install elastic-package locally.
• Start elastic stack using elastic-package.
• Move to integrations/packages/golang) directory.
• Run the following command to run tests. elastic-package test

Related issues

• Relates Migration of Golang Integration #4864

Screenshots

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Build stats

• Start Time: 2023-02-08T06:02:11.451+0000

• Duration: 15 min 18 sec

Test stats 🧪

Test	Results
Failed	0
Passed	12
Skipped	0
Total	12

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[kush-elastic]

/test

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (2/2)	💚 2.427
Classes	100.0% (2/2)	💚 2.427
Methods	100.0% (16/16)	💚 8.624
Lines	95.833% (184/192)	👍 4.282
Conditionals	100.0% (0/0)	💚

[kush-elastic]

/test

[kush-elastic]

LGTM!

[SubhrataK]

1. The line graphs and the summary for GC Count Overtime and heap Summary, are overlapping. Please move the summary outside the graph panel, as in the case of System Memory and Heap Memory Graphs.
2. Please break the GC duration over time panel into two different charts, as there is too much information displayed in just one graph

[ishleenk17]

Are both the GET and POST methods available for getting metrics?

[niraj-crest]

Yes, Both are available and provide the same result.

[ishleenk17]

Any performance difference between using the 2 ?

[niraj-crest]

Nope. we get the same response from both methods.

[niraj-crest]

Due to the limitation of integration package, following fields were dropped:

1. golang.heap.gc.pause.count
2. golang.heap.gc.pause.avg.ns
3. golang.heap.gc.pause.sum.ns
4. golang.heap.gc.pause.max.ns

We have raised a github issue related to this limitation here.

[ishleenk17]

Looks good!