[Logstash] Add datastream period option

[crespocarlos]

What does this PR do?

• Add the period variable to each metrics data stream to enable granular polling frequency
• Release the package to a GA version and set the metrics data streams as beta

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

• Build Logstash package
• elastic-package stack up -v -d
• Install Logstash package

Related issues

• Part of [Stack Monitoring] Add missing period field to data stream manifests #4910

Screenshots

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• Start Time: 2023-02-08T09:24:50.422+0000

• Duration: 18 min 26 sec

Test stats 🧪

Test	Results
Failed	0
Passed	25
Skipped	0
Total	25

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (6/6)	💚
Classes	100.0% (6/6)	💚
Methods	100.0% (46/46)	💚 39.241
Lines	87.558% (190/217)	👎 -11.975
Conditionals	100.0% (0/0)	💚

[mohamedhamed-ahmed]

LGTM

[elasticmachine]

Package logstash - 2.2.1-preview1 containing this change is available at https://epr.elastic.co/search?package=logstash