docs: Merge #2644

2644: Connect API with migration algorithm r=jonathanknowles a=jonathanknowles

# Issue Number

ADP-840

# Overview

This PR:

- [x] Implements `Api.Server.createWalletMigrationPlan`.
- [x] Implements `Api.Server.migrateWallet`.
- [x] Adjusts `migrateWallet` to require a non-empty list of addresses.
- [x] Adjusts the success response types for all migration endpoints to be `202` `ACCEPTED`.
- [x] Resurrects all previously-disabled integration tests (for ada-specific wallets).
- [x] Removes the "disabled" warnings on migration endpoints.
- [x] Adds integration test coverage for MA wallets.

# QA Due Diligence

After rewriting the integration test suite, I ran the entire integration test suite 500 times in an effort to increase confidence that there are no flaky tests. The test suite passed 500 times, with no failures or errors.

Co-authored-by: Jonathan Knowles <jonathan.knowles@iohk.io> a60199f

api/edge/swagger.yaml

@@ -3686,8 +3686,8 @@ x-responsesCreateWalletMigrationPlan: &responsesCreateWalletMigrationPlan
         schema: *errNothingToMigrate
   <<: *responsesErr404WalletNotFound
   <<: *responsesErr406
-  200:
-    description: Ok
+  202:
+    description: Accepted
     content:
       application/json:
         schema: *ApiWalletMigrationPlan
@@ -3705,13 +3705,14 @@ x-responsesMigrateWallet: &responsesMigrateWallet
   <<: *responsesErr404WalletNotFound
   <<: *responsesErr406
   <<: *responsesErr415UnsupportedMediaType
-  200:
-    description: Ok
+  202:
+    description: Accepted
     content:
       application/json:
         schema:
           type: array
           items: *ApiTransaction
+          minItems: 1
 
 x-responsesDeleteWallet: &responsesDeleteWallet
   <<: *responsesErr400
@@ -4656,10 +4657,6 @@ paths:
       tags: ["Migrations"]
       summary: Migrate
       description: |
-        <p align="right">status: <strong>disabled</strong></p>
-        <strong>⚠️IMPORTANT⚠️</strong> This endpoint has been temporarily disabled with the introduction of multi-assets UTxO. It will be enabled again soon.
-
-        <hr/>
         Migrate the UTxO balance of this wallet to the given set of addresses.
 
         This operation will attempt to transfer as much of the wallet's balance
@@ -4694,10 +4691,6 @@ paths:
       tags: ["Migrations"]
       summary: Create a migration plan
       description: |
-        <p align="right">status: <strong>disabled</strong></p>
-        <strong>⚠️IMPORTANT⚠️</strong> This endpoint has been temporarily disabled with the introduction of multi-assets UTxO. It will be enabled again soon.
-
-        <hr/>
         Generate a plan for migrating the UTxO balance of this wallet to
         another wallet, without executing the plan.