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/config_reader_test.go

@@ -240,11 +240,9 @@ func validateDatasource(t *testing.T, dsCfg *configs) {
 	require.Equal(t, ds.OrgID, int64(2))
 	require.Equal(t, ds.URL, "url")
 	require.Equal(t, ds.User, "user")
-	require.Equal(t, ds.Password, "password")
 	require.Equal(t, ds.Database, "database")
 	require.True(t, ds.BasicAuth)
 	require.Equal(t, ds.BasicAuthUser, "basic_auth_user")
-	require.Equal(t, ds.BasicAuthPassword, "basic_auth_password")
 	require.True(t, ds.WithCredentials)
 	require.True(t, ds.IsDefault)
 	require.True(t, ds.Editable)