* chore: add /v2 to import module path
go mod requires semantic versioning with versions greater than 1.x
This was a mechanical update by running:
```
go install github.com/marwan-at-work/mod/cmd/mod@latest
mod upgrade
```
Migrate generated files to import /v2
* Fix gen
* fix: Update GIT_COMMITTER_NAME to use username
This was a mistake when adding the committer fields 🤦.
* fix: Use environment variables for agent authentication
Using files led to situations where running "coder server --dev" would
break `gitssh`. This is applicable in a production environment too. Users
should be able to log into another Coder deployment from their workspace.
Users can still set "CODER_URL" if they'd like with agent env vars!
1. Adds benchmarks comparing bcrypt and our pbkdf2 settings
1. Changes the pbkdf2 hash iterations back to 65k. 1024 is insecure
1. Gets rid of the short circuit when the user isn't found, preventing
timing attacks which can reveal which emails exist on a deployment
```
$ go test -bench .
goos: linux
goarch: amd64
pkg: github.com/coder/coder/coderd/userpassword
cpu: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz
BenchmarkBcryptMinCost-16 1651 702727 ns/op 5165 B/op 10 allocs/op
BenchmarkPbkdf2MinCost-16 1669 714843 ns/op 804 B/op 10 allocs/op
BenchmarkBcryptDefaultCost-16 27 42676316 ns/op 5246 B/op 10 allocs/op
BenchmarkPbkdf2-16 26 45902236 ns/op 804 B/op 10 allocs/op
PASS
ok github.com/coder/coder/coderd/userpassword 5.036s
```
