Add disk io metrics to fields.yml

[fearful-symmetry]

Proposed commit message

Adds disk IO metrics to fields.yml, as these fields are now in metricbeat.

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.

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• Start Time: 2023-12-13T17:56:11.572+0000

• Duration: 18 min 12 sec

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Total	158

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[agithomas]

Do you want to consider adding additional dashboard panels to display process disk IO stats?

[agithomas]

Since system/process is TSDB enabled datastream, it is recommended to run the TSDB test tool kit to validate any possible data loss due to non-unique dimension fields.

[fearful-symmetry]

@agithomas alright, tested with the toolkit, no issues.

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Data stream	Previous EPS	New EPS	Diff (%)	Result
auth	2898.55	2331	-567.55 (-19.58%)	💔
syslog	21276.6	12820.51	-8456.09 (-39.74%)	💔

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (3/3)	💚
Files	100.0% (4/4)	💚
Classes	100.0% (4/4)	💚
Methods	67.857% (57/84)	❕
Lines	98.426% (3002/3050)	❕
Conditionals	100.0% (0/0)	💚

[agithomas]

LGTM!

[elasticmachine]

Package system - 1.51.0 containing this change is available at https://epr.elastic.co/search?package=system

[IanLee1521]

Do you want to consider adding additional dashboard panels to display process disk IO stats?

Personally I do think these would be helpful.