[v10.4.x] Plugins: Pass PDC file contents in requests (#85144)

* Plugins: Pass PDC file contents in requests (#84783)

* Plugins: Pass PDC file contents in requests

* go mod tidy

* undo go.mod changes

* fix linter

* fix tests

* undo unnecessary changes

* update dep

* join with comma

* update naming

* bump SDK

(cherry picked from commit b765c21d4c)

* set env + req config

* fix linter

pkg/plugins/envvars/envvars_test.go

@@ -686,7 +686,7 @@ func TestService_GetConfigMap(t *testing.T) {
 					ShowUI:        true,
 					ClientCert:    "c3rt",
 					ClientKey:     "k3y",
-					RootCA:        "ca",
+					RootCAs:       []string{"ca"},
 					ProxyAddress:  "https://proxy.grafana.com",
 					ServerName:    "secureProxy",
 					AllowInsecure: true,
@@ -712,7 +712,7 @@ func TestService_GetConfigMap(t *testing.T) {
 					ShowUI:       true,
 					ClientCert:   "c3rt",
 					ClientKey:    "k3y",
-					RootCA:       "ca",
+					RootCAs:      []string{"ca"},
 					ProxyAddress: "https://proxy.grafana.com",
 					ServerName:   "secureProxy",
 				},
@@ -730,7 +730,7 @@ func TestService_GetConfigMap(t *testing.T) {
 					ShowUI:       true,
 					ClientCert:   "c3rt",
 					ClientKey:    "k3y",
-					RootCA:       "ca",
+					RootCAs:      []string{"ca"},
 					ProxyAddress: "https://proxy.grafana.com",
 					ServerName:   "secureProxy",
 				},