[8.6] Use v1 data stream names for log shipping

[blakerouse]

What does this PR do?

Changes the elastic-agent log monitoring to use the old names that match v1. This is for 8.6 only!

Why is it important?

So no fixes are required on Fleet side for new v2 architecture to work with 8.6.

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.next.asciidoc or CHANGELOG-developer.next.asciidoc.

• Relates V2: Elastic agent monitoring data stream names should not be per process #1814

• Closes (8.6) V2: Spawned process logs cannot be sent to fleet #1847

[cmacknz]

Changes look good. Have you confirmed this works as expected with Fleet?

[elasticmachine]

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• Start Time: 2022-11-30T15:04:54.383+0000

• Duration: 18 min 35 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4613
Skipped	13
Total	4626

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	98.333% (59/60)	👍
Files	69.082% (143/207)	👍
Classes	69.133% (271/392)	👍
Methods	53.8% (814/1513)	👍
Lines	38.967% (8789/22555)	👎 -0.035
Conditionals	100.0% (0/0)	💚

[blakerouse]

Yes I have confirmed this works with Fleet.

[cmacknz]

I am going to forward port this to main to avoid having to triage reports that this is broken there. The plan is still to follow up and adjust the data stream names in 8.7.