Before change
```
⇶ golangci-lint run --disable-all --no-config --enable=staticcheck | ack SA6005
builder/profitbricks/step_create_server.go:254:22: SA6005: should use strings.EqualFold(a, b) instead of strings.ToLower(a) == strings.ToLower(b) (staticcheck)
builder/oneandone/config.go:97:7: SA6005: should use strings.EqualFold(a, b) instead of strings.ToLower(a) == strings.ToLower(b) (staticcheck)
builder/vmware/common/driver_parser.go:1199:7: SA6005: should use strings.EqualFold(a, b) instead of strings.ToLower(a) == strings.ToLower(b) (staticcheck)
```
After change
```
⇶ golangci-lint run --disable-all --no-config --enable=staticcheck | ack SA6005
```
Run now takes a context as well as a statebag. We'll assign the context
to the blank identifier to prevent namespace collisions. We'll let the
step authors opt-in to using the context.
`find . -iname "step_*.go" -exec gsed -i'' 's/func \(.*\)Run(/func \1Run(_ context.Context, /' {} \;`