[8.15](backport #3681) [Automation] Bump Golang version to 1.22.5

Update .go-version

1 file(s) updated with "1.22.5": * .go-version

1.22.5

no GitHub Release found for go1.22.5 on "https://github.com/golang/go"

Update .golangci.yml

1 file(s) updated with "1.22.5": * .golangci.yml

1.22.5

no GitHub Release found for go1.22.5 on "https://github.com/golang/go"

Update go.mod

1 file(s) updated with "go 1.22": * go.mod

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This is an automatic backport of pull request #3681 done by Mergify.

elastic / fleet-server