backend: use latest sdk (#28147)

fixes #27713 via https://github.com/grafana/grafana-plugin-sdk-go/pull/227

go.mod

@@ -41,7 +41,7 @@ require (
 	github.com/google/go-cmp v0.5.0
 	github.com/gosimple/slug v1.4.2
 	github.com/grafana/grafana-plugin-model v0.0.0-20190930120109-1fc953a61fb4
-	github.com/grafana/grafana-plugin-sdk-go v0.77.0
+	github.com/grafana/grafana-plugin-sdk-go v0.78.0
 	github.com/grafana/loki v1.6.0
 	github.com/grpc-ecosystem/go-grpc-middleware v1.2.1
 	github.com/hashicorp/go-hclog v0.12.2

go.sum

@@ -578,8 +578,8 @@ github.com/gosimple/slug v1.4.2 h1:jDmprx3q/9Lfk4FkGZtvzDQ9Cj9eAmsjzeQGp24PeiQ=
 github.com/gosimple/slug v1.4.2/go.mod h1:ER78kgg1Mv0NQGlXiDe57DpCyfbNywXXZ9mIorhxAf0=
 github.com/grafana/grafana-plugin-model v0.0.0-20190930120109-1fc953a61fb4 h1:SPdxCL9BChFTlyi0Khv64vdCW4TMna8+sxL7+Chx+Ag=
 github.com/grafana/grafana-plugin-model v0.0.0-20190930120109-1fc953a61fb4/go.mod h1:nc0XxBzjeGcrMltCDw269LoWF9S8ibhgxolCdA1R8To=
-github.com/grafana/grafana-plugin-sdk-go v0.77.0 h1:iHvNGs6F+KHXozOiL6KBgwVfm7JKztoML1yV7Zy2sls=
-github.com/grafana/grafana-plugin-sdk-go v0.77.0/go.mod h1:NvxLzGkVhnoBKwzkst6CFfpMFKwAdIUZ1q8ssuLeF60=
+github.com/grafana/grafana-plugin-sdk-go v0.78.0 h1:w43X+b36goTvis4TAW5PzhkGuSJokgm3KKYPOYiENAc=
+github.com/grafana/grafana-plugin-sdk-go v0.78.0/go.mod h1:NvxLzGkVhnoBKwzkst6CFfpMFKwAdIUZ1q8ssuLeF60=
 github.com/grafana/loki v1.6.0 h1:vHuFgfhW1iRMCm7/LgnZi02Ifvqj389vWhyfNJlHQTQ=
 github.com/grafana/loki v1.6.0/go.mod h1:X+GvtCzAf2ok/xRLLvGB8kuWP1R+75nXnvjCEnenP0s=
 github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=