Closes https://github.com/coder/internal/issues/780
## Summary of changes:
- added `user_secrets` table
- `user_secrets` table contains `env_name` and `file_path` fields which
are not used at the moment, but will be used in later PRs
- `user_secrets` table doesn't contain `value_key_id`, I will add it in
a separate migration in a dbcrypt PR
- on one hand I don't want to add fields which are not used (because
it's a risk smth may change in implementation later), on the other hand
I don't want to add too many migrations for user secrets table
- added unique sql indexes
- added sql queries for CRUD operations on user-secrets
- introduced new `ResourceUserSecret` resource
- basic unit-tests for CRUD ops and authorization behavior
- Role updates:
- owner:
- remove `ResourceUserSecret` from site-wide perms
- add `ResourceUserSecret` to user-wide perms
- orgAdmin
- remove `ResourceUserSecret` from org-wide perms; seems it's not
strictly required, because `ResourceUserSecret` is not tied to
organization in dbauthz wrappers?
- memberRole
- no need to change memberRole because it implicitly has access to
user-secrets thanks to the `allPermsExcept`
- is it enough changes to roles?
Main questions:
- [ ] We will have 2 migrations for user-secrets:
- initial migration (in current PR)
- adding `value_key_id` in dbcrypt PR
- is this approach reasonable?
- [ ] Are changes to roles's permissions are correct?
- [ ] Are changes in roles_test.go are correct?
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Co-authored-by: Steven Masley <Emyrk@users.noreply.github.com>