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

[harnish-crest]

• Enhancement

What does this PR do?

• Added 1 data stream (Pool 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 Process Data Stream #4652

Screenshots

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Build stats

• Start Time: 2022-11-15T16:59:43.331+0000

• Duration: 15 min 45 sec

Test stats 🧪

Test	Results
Failed	0
Passed	6
Skipped	0
Total	6

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[kush-elastic]

/test

[kush-elastic]

/test

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (1/1)	💚 2.314
Classes	100.0% (1/1)	💚 2.314
Methods	100.0% (8/8)	💚 8.73
Lines	95.763% (113/118)	👍 4.058
Conditionals	100.0% (0/0)	💚

[kush-elastic]

LGTM

[ManojS-shetty]

Q:Are we not keeping this docker image in elastic repo? In here: https://container-library.elastic.co/

For Example which i can see in redis for beats repo: https://github.com/elastic/beats/blob/cd547c688521c6475120200fecd4cca29a05eb5b/metricbeat/module/redis/docker-compose.yml#L5

[harnish-crest]

We never came across adding docker image in elastic repo till now. Also we do not have the access for the elastic repo.

[ManojS-shetty]

LGTM!

[elasticmachine]

Package php_fpm - 0.1.0 containing this change is available at https://epr.elastic.co/search?package=php_fpm