[Automation] Bump Golang version to 1.20.7

[apmmachine]

See changelog for 1.20.7

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Bump golang-version to latest version

Update .go-version

Updated to content "1.20.7" in file ".go-version"

1.20.7

no GitHub Release found for go1.20.7 on "https://github.com/golang/go"

Update .golangci.yml

Updated to content "1.20.7" in file ".golangci.yml"

1.20.7

no GitHub Release found for go1.20.7 on "https://github.com/golang/go"

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[elasticmachine]

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• Start Time: 2023-08-05T20:01:44.895+0000

• Duration: 22 min 46 sec

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