Fix permissions on default state sub-directories when Agent runs as container

[ycombinator]

What does this PR do?

This PR fixes the permissions of the state/data/tmp and state/data/logs folders when they're setup as part of elastic-agent container running.

Why is it important?

To allow processes within the same group as elastic-agent, e.g. Heartbeat, to write to the state/data/tmp and state/data/logs folders.

Note that there is another folder that's a sibling of those two, state/data/run but it already has the correct permissions, so this PR doesn't do anything with it.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool

Author's Checklist

How to test this PR locally

1. Rebuild the docker images for Elastic Agent.
2. Run the docker container for Elastic Agent from the freshly-built image.
3. Check the paths of sub-folders under /usr/share/elastic-agent/state/data. Verify that all of them are group-writeable.

Related issues

• Closes [Heartbeat] Changes to default beats directories prevent startup #2315

Use cases

Screenshots

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After this PR

Logs

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• Start Time: 2023-03-01T08:48:40.968+0000

• Duration: 21 min 56 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4959
Skipped	15
Total	4974

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	98.361% (60/61)	👍
Files	68.9% (144/209)	👍
Classes	68.08% (273/401)	👍
Methods	53.517% (837/1564)	👍
Lines	38.819% (9174/23633)	👎 -0.03
Conditionals	100.0% (0/0)	💚

[michalpristas]

components should not write any logs since 8.6, agent collects them and they are part of single log file, but i'm ok with the change