fix(log): ETH-1685 instantiate logrus with non-nil io.Writer

[ATMackay]

Applications built with github.com/AlluvialFinance/go-utils/app.App appear to be panicking at runtime when built with go 1.22

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x18 pc=0x101110308]

goroutine 1 [running]:
github.com/sirupsen/logrus.(*Entry).write(0x140002ede30)
        /Users/alexandermackay/go/pkg/mod/github.com/sirupsen/[email protected]/entry.go:294 +0x148
github.com/sirupsen/logrus.(*Entry).log(0x140002eddc0, 0x3, {0x14000656f30, 0x16})
        /Users/alexandermackay/go/pkg/mod/github.com/sirupsen/[email protected]/entry.go:252 +0x43c
github.com/sirupsen/logrus.(*Entry).Log(0x140002eddc0, 0x3, {0x1400005bc58?, 0x1400038bd70?, 0x1025f34bc?})
        /Users/alexandermackay/go/pkg/mod/github.com/sirupsen/[email protected]/entry.go:304 +0x60
github.com/sirupsen/logrus.(*Logger).Log(0x14000900900, 0x3, {0x1400005bc58, 0x1, 0x1})
        /Users/alexandermackay/go/pkg/mod/github.com/sirupsen/[email protected]/logger.go:204 +0x60
github.com/sirupsen/logrus.(*Logger).Warn(0x1400064b4a0?, {0x1400005bc58?, 0x0?, 0x0?})
        /Users/alexandermackay/go/pkg/mod/github.com/sirupsen/[email protected]/logger.go:236 +0x30
github.com/alluvialfinance/alluvial-api/cmd.NewRootCommand.NewRunCommand.func2(0x1400001e008?, {0x10367fe20, 0x0, 0x101b84ed7?})
        /Users/alexandermackay/go/src/github.com/AlluvialFinance/alluvial-api/cmd/run.go:16 +0x68
github.com/spf13/cobra.(*Command).execute(0x1400001e008, {0x10367fe20, 0x0, 0x0})
        /Users/alexandermackay/go/pkg/mod/github.com/spf13/[email protected]/command.go:983 +0x840
github.com/spf13/cobra.(*Command).ExecuteC(0x140002f6908)
        /Users/alexandermackay/go/pkg/mod/github.com/spf13/[email protected]/command.go:1115 +0x344
github.com/spf13/cobra.(*Command).Execute(0x101a7af18?)
        /Users/alexandermackay/go/pkg/mod/github.com/spf13/[email protected]/command.go:1039 +0x1c
main.main()
        /Users/alexandermackay/go/src/github.com/AlluvialFinance/alluvial-api/main.go:10 +0x20

Upon closer inspection of the github.com/AlluvialFinance/go-utils/log package, it appears that the logger called in New(cfg *config.Config) is being instantiated without a specifying Logger.Out.

This PR

• Refactors the log package so that New() returns an interface. We can consider alternative implementations in future but this will also help with unit testing.
• Instantiates logrus Logger with the default values, including a writer to StdErr.
• Updates go from 1.20 --> 1.22

[mischat]

@ATMackay, i guess this needs to be merged, or is this no longer needed ?

[jdiuwe]

This PR can be closed.