feat: Remove sales channels from pub keys (#6876)

**What**
- Add workflow + step for detaching sales channels from pub API keys
- Tweak linking error message to be more helpful
- Add `removeRemoteLink` step to delete API key workflow

packages/modules-sdk/src/remote-link.ts

@@ -6,6 +6,7 @@ import {
 
 import { isObject, promiseAll, toPascalCase } from "@medusajs/utils"
 import { MedusaModule } from "./medusa-module"
+import { linkingErrorMessage } from "./utils/linking-error"
 
 export type DeleteEntityInput = {
   [moduleName: string]: { [linkableKey: string]: string | string[] }
@@ -353,7 +354,13 @@ export class RemoteLink {
 
       if (!service) {
         throw new Error(
-          `Module to link ${moduleA}[${moduleAKey}] and ${moduleB}[${moduleBKey}] was not found.`
+          linkingErrorMessage({
+            moduleA,
+            moduleAKey,
+            moduleB,
+            moduleBKey,
+            type: "link",
+          })
         )
       } else if (!serviceLinks.has(service.__definition.key)) {
         serviceLinks.set(service.__definition.key, [])
@@ -404,7 +411,13 @@ export class RemoteLink {
 
       if (!service) {
         throw new Error(
-          `Module to dismiss link ${moduleA}[${moduleAKey}] and ${moduleB}[${moduleBKey}] was not found.`
+          linkingErrorMessage({
+            moduleA,
+            moduleAKey,
+            moduleB,
+            moduleBKey,
+            type: "dismiss",
+          })
         )
       } else if (!serviceLinks.has(service.__definition.key)) {
         serviceLinks.set(service.__definition.key, [])