Feat(auth): Remove auth provider entity (#6314)

**What**
- remove auth provider entity

**Why**
- The auth provider entity was not really used anywhere

**How**
- Keeping loader behavior as is but removing the 

Co-authored-by: Sebastian Rindom <7554214+srindom@users.noreply.github.com>

packages/core-flows/src/auth/steps/set-auth-app-metadata.ts

@@ -1,4 +1,5 @@
 import { StepResponse, createStep } from "@medusajs/workflows-sdk"
+
 import { IAuthModuleService } from "@medusajs/types"
 import { ModuleRegistrationName } from "@medusajs/modules-sdk"
 import { isDefined } from "@medusajs/utils"
@@ -17,7 +18,7 @@ export const setAuthAppMetadataStep = createStep(
       ModuleRegistrationName.AUTH
     )
 
-    const authUser = await service.retrieveAuthUser(data.authUserId)
+    const authUser = await service.retrieve(data.authUserId)
 
     const appMetadata = authUser.app_metadata || {}
     if (isDefined(appMetadata[data.key])) {
@@ -26,7 +27,7 @@ export const setAuthAppMetadataStep = createStep(
 
     appMetadata[data.key] = data.value
 
-    await service.updateAuthUser({
+    await service.update({
       id: authUser.id,
       app_metadata: appMetadata,
     })
@@ -44,14 +45,14 @@ export const setAuthAppMetadataStep = createStep(
       ModuleRegistrationName.AUTH
     )
 
-    const authUser = await service.retrieveAuthUser(id)
+    const authUser = await service.retrieve(id)
 
     const appMetadata = authUser.app_metadata || {}
     if (isDefined(appMetadata[key])) {
       delete appMetadata[key]
     }
 
-    await service.updateAuthUser({
+    await service.update({
       id: authUser.id,
       app_metadata: appMetadata,
     })