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/broken-yaml/commented.yaml

@@ -16,8 +16,6 @@
 #   org_id: 1
 #   # <string> url
 #   url: http://localhost:8080
-#   # <string> database password, if used
-#   password:
 #   # <string> database user, if used
 #   user:
 #   # <string> database name, if used
@@ -26,8 +24,6 @@
 #   basic_auth:
 #   # <string> basic auth username
 #   basic_auth_user:
-#   # <string> basic auth password
-#   basic_auth_password:
 #   # <bool> enable/disable with credentials headers
 #   with_credentials:
 #   # <bool> mark as default datasource. Max one per org