Remove snake case from metrics names in snapshot templates

[elcasteel]

We tried to use snake case for metrics names (

solo-kit/pkg/code-generator/codegen/templates/snapshot_emitter_template.go

Line 39 in 2305af4

{{ $emitter_prefix := (print (snake .Name) "/emitter") }}

) but a bug in http://github.com/iancoleman/strcase meant that the names were rendered with dots anyway. A newer version of that library fixes the bug and if we update it, the metrics names change.

At this point, our users all have dashboards based on metrics names with dots and we should keep that convention.

[elcasteel]

a complication is that solo-projects has already pulled in the updated version of the library and now has some files with snake case: https://github.com/solo-io/solo-projects/blob/master/projects/observability/pkg/api/v1/dashboards_snapshot_emitter.sk.go