Datasource: Remove support for unencrypted passwords (#49987)

* Datasource: Remove support for unencrypted passwords

* regenerate swagger

* [WIP] Remove references to datasource password and basic auth password fields (#50015)

* try delete moar tings

* delete provisioning stuff

* remove from yaml

* update snapshots

* remove lingering snapshot fields

* fix ds http settings

* Re-generate swagger and fix swagger-api-spec make target

Co-authored-by: Will Browne <will.browne@grafana.com>
Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

pkg/services/provisioning/datasources/testdata/version-0/version-0.yaml

@@ -4,12 +4,10 @@ datasources:
     access: proxy
     org_id: 2
     url: url
-    password: password
     user: user
     database: database
     basic_auth: true
     basic_auth_user: basic_auth_user
-    basic_auth_password: basic_auth_password
     with_credentials: true
     is_default: true
     json_data: