[PHP-FPM] Add Integration Package with Process Data Stream

[harnish-crest]

• Enhancement

What does this PR do?

• Added 1 data stream (Process 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/php_fpm) directory.
• Run the following command to run tests.
  elastic-package test

Related issues

• Relates Create php-fpm package #636
• Relates [PHP-FPM] Add Integration Package with Pool Data Stream #4603

Screenshots

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Build stats

• Start Time: 2022-11-24T11:26:42.513+0000

• Duration: 15 min 11 sec

Test stats 🧪

Test	Results
Failed	0
Passed	12
Skipped	0
Total	12

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[kush-elastic]

/test

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (2/2)	💚 2.314
Classes	100.0% (2/2)	💚 2.314
Methods	100.0% (16/16)	💚 8.754
Lines	95.763% (226/236)	👍 4.012
Conditionals	100.0% (0/0)	💚

[kush-elastic]

LGTM!

[elasticmachine]

Package php_fpm - 0.2.0 containing this change is available at https://epr.elastic.co/search?package=php_fpm