fix ECS schema on system/auth package

[belimawr]

What does this PR do?

This commit fixes the ECS schema on system/auth package.

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.

## Author's Checklist

How to test this PR locally

go mod edit -replace github.com/elastic/elastic-package=github.com/jsoriano/elastic-package@check-allowed-values
go mod tidy
cd packages/system/data_stream/auth

elastic-package stack up -d -v
eval "$(elastic-package stack shellinit)"

go run github.com/elastic/elastic-package test pipeline -d auth

Related issues

• Fixes system package using invalid field values according to ECS  #3051

## Screenshots

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Build stats

• Start Time: 2022-06-03T13:06:16.993+0000

• Duration: 15 min 12 sec

Test stats 🧪

Test	Results
Failed	0
Passed	271
Skipped	0
Total	271

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (3/3)	💚
Files	100.0% (4/4)	💚 3.44
Classes	100.0% (4/4)	💚 3.44
Methods	59.74% (46/77)	👎 -29.122
Lines	98.782% (2676/2709)	👍 9.0
Conditionals	100.0% (0/0)	💚

[rdner]

Is there a test that's using this schema? Was it failing before?

[belimawr]

Is there a test that's using this schema? Was it failing before?

It's kinda the other way around, tests are being introduced and are failing because some packages don't fully comply with the ECS: elastic/elastic-package#771

[jsoriano]

Thanks!

[andrewkroh]

Can you please add a changelog entry.

[belimawr]

Can you please add a changelog entry.

Done on ce5e909

[jsoriano]

@belimawr you also need to update the version in the manifest.

For next time you can also use elastic-package changelog add, that manages this 🙂

[jsoriano]

Thanks! 👍