[O11y][GoLang] Resolve the conflict in host.ip field

[harnish-elastic]

• Bug

What does this PR do?

Added host.ip field in ecs.yml and added re-indexing steps to resolve conflicts for existing users.

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.

Related issues

• Closes [O11y][Golang] Conflicts in host.ip field #7240
• Relates Make Golang GA #7239

[elasticmachine]

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• Start Time: 2023-08-28T12:34:16.959+0000

• Duration: 15 min 27 sec

Test stats 🧪

Test	Results
Failed	0
Passed	12
Skipped	0
Total	12

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (2/2)	💚 8.333
Classes	100.0% (2/2)	💚 8.333
Methods	100.0% (16/16)	💚 14.844
Lines	95.833% (184/192)	👍 3.374
Conditionals	100.0% (0/0)	💚

[muthu-mps]

Looks good!

[elasticmachine]

Package golang - 0.4.1 containing this change is available at https://epr.elastic.co/search?package=golang