Plugins: Update to latest go plugin SDK (0.256.0) (#95065)

* update to latest go plugin SDK

* make update-workspace

* update alerting tests

pkg/promlib/go.mod

@@ -4,10 +4,10 @@ go 1.23.1
 
 require (
 	github.com/grafana/dskit v0.0.0-20240805174438-dfa83b4ed2d3
-	github.com/grafana/grafana-plugin-sdk-go v0.255.0
+	github.com/grafana/grafana-plugin-sdk-go v0.256.0
 	github.com/json-iterator/go v1.1.12
 	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/prometheus/client_golang v1.20.4
+	github.com/prometheus/client_golang v1.20.5
 	github.com/prometheus/common v0.60.0
 	github.com/prometheus/prometheus v1.8.2-0.20221021121301-51a44e6657c3
 	github.com/stretchr/testify v1.9.0
@@ -30,7 +30,7 @@ require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cheekybits/genny v1.0.0 // indirect
 	github.com/chromedp/cdproto v0.0.0-20240810084448-b931b754e476 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dennwc/varint v1.0.0 // indirect
 	github.com/elazarl/goproxy v0.0.0-20240726154733-8b0c20506380 // indirect
@@ -97,7 +97,7 @@ require (
 	github.com/unknwon/bra v0.0.0-20200517080246-1e3013ecaff8 // indirect
 	github.com/unknwon/com v1.0.1 // indirect
 	github.com/unknwon/log v0.0.0-20200308114134-929b1006e34a // indirect
-	github.com/urfave/cli v1.22.15 // indirect
+	github.com/urfave/cli v1.22.16 // indirect
 	github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/zeebo/xxh3 v1.0.2 // indirect