Upgrade to latest operator-sdk

[ytsarev]

Let's try to keep up with the upstream https://github.com/operator-framework/operator-sdk/releases/tag/v1.8.0

It might also solve security vulnerability rating crypto transitive dependency in manager https://artifacthub.io/packages/helm/k8gb/k8gb?modal=security-report

[ytsarev]

I've checked go.sum that is generated by the latest v0.19 operator-sdk init . It only contains higher version of controller-runtime . We can upgrade later but it is not relater to xcrypto vulnerability according to go mod graph