Replace go-bindata with embed

[tylerauerbeck]

Currently Nebraska is making use of go-bindata I believe just to ship the sql migration files. I believe this was likely done pre Go 1.16 where embed didn't exist. Taking a look at go-bindata today it doesn't seem like it's been maintained in some time and most projects I've seen have moved to make use of embed (or at a minimum one of a few other projects that provide similar behavior).

It would be good to take a look to see if the native functionality serves the purpose well or if another maintained library should be picked up for this.

Similar comments here: #14 (comment)

[ervcz]

After a quick look into the Nebraska codebase to evaluate migrating from go-bindata to Go's native embed package, here's what I found:

Current Usage:

• go-bindata is used exclusively in backend/pkg/api/ to embed SQL files (migrations, sample data, drop tables)
• 2 direct Asset() calls in the codebase
• Main integration point is with sql-migrate via AssetMigrationSource