repomap: Add RHEL8 aarch64 repos for Alibaba RHUI

```
The following repos have been added:
 - Repo(pesid='rhel8-CRB', major_version='8', repoid='rhui-codeready-builder-for-rhel-8-aarch64-rhui-rpms', repo_type='rpm', channel='ga', arch='aarch64', rhui='alibaba')
 - Repo(pesid='rhel8-rhui-custom-client-at-alibaba', major_version='8', repoid='rhui-custom-rhui_client_at_alibaba-rhel-8', repo_type='rpm', channel='ga', arch='aarch64', rhui='alibaba')
 - Repo(pesid='rhel8-BaseOS', major_version='8', repoid='rhui-rhel-8-for-aarch64-baseos-rhui-rpms', repo_type='rpm', channel='ga', arch='aarch64', rhui='alibaba')
 - Repo(pesid='rhel8-Supplementary', major_version='8', repoid='rhui-rhel-8-for-aarch64-supplementary-rhui-rpms', repo_type='rpm', channel='ga', arch='aarch64', rhui='alibaba')
 - Repo(pesid='rhel8-AppStream', major_version='8', repoid='rhui-rhel-8-for-aarch64-appstream-rhui-rpms', repo_type='rpm', channel='ga', arch='aarch64', rhui='alibaba')
 ```

Related PR: oamg#1137

(cherry picked from commit c63ccbb)

Author: matejmatuska

etc/leapp/files/repomap.json

@@ -1,5 +1,5 @@
 {
-    "datetime": "202401171742Z",
+    "datetime": "202401261328Z",
     "version_format": "1.2.0",
     "mapping": [
         {
@@ -1487,6 +1487,14 @@
                     "channel": "ga",
                     "repo_type": "rpm"
                 },
+                {
+                    "major_version": "8",
+                    "repoid": "rhui-rhel-8-for-aarch64-baseos-rhui-rpms",
+                    "arch": "aarch64",
+                    "channel": "ga",
+                    "repo_type": "rpm",
+                    "rhui": "alibaba"
+                },
                 {
                     "major_version": "8",
                     "repoid": "rhui-rhel-8-for-x86_64-baseos-e4s-rhui-rpms",
@@ -1715,6 +1723,14 @@
                     "channel": "ga",
                     "repo_type": "rpm"
                 },
+                {
+                    "major_version": "8",
+                    "repoid": "rhui-rhel-8-for-aarch64-appstream-rhui-rpms",
+                    "arch": "aarch64",
+                    "channel": "ga",
+                    "repo_type": "rpm",
+                    "rhui": "alibaba"
+                },
                 {
                     "major_version": "8",
                     "repoid": "rhui-rhel-8-for-x86_64-appstream-e4s-rhui-rpms",
@@ -1868,6 +1884,14 @@
                     "channel": "ga",
                     "repo_type": "rpm"
                 },
+                {
+                    "major_version": "8",
+                    "repoid": "rhui-codeready-builder-for-rhel-8-aarch64-rhui-rpms",
+                    "arch": "aarch64",
+                    "channel": "ga",
+                    "repo_type": "rpm",
+                    "rhui": "alibaba"
+                },
                 {
                     "major_version": "8",
                     "repoid": "rhui-codeready-builder-for-rhel-8-x86_64-rhui-rpms",
@@ -1997,6 +2021,14 @@
                     "repo_type": "rpm",
                     "rhui": "aws"
                 },
+                {
+                    "major_version": "8",
+                    "repoid": "rhui-rhel-8-for-aarch64-supplementary-rhui-rpms",
+                    "arch": "aarch64",
+                    "channel": "ga",
+                    "repo_type": "rpm",
+                    "rhui": "alibaba"
+                },
                 {
                     "major_version": "8",
                     "repoid": "rhui-rhel-8-for-x86_64-supplementary-rhui-rpms",
@@ -2665,6 +2697,14 @@
         {
             "pesid": "rhel8-rhui-custom-client-at-alibaba",
             "entries": [
+                {
+                    "major_version": "8",
+                    "repoid": "rhui-custom-rhui_client_at_alibaba-rhel-8",
+                    "arch": "aarch64",
+                    "channel": "ga",
+                    "repo_type": "rpm",
+                    "rhui": "alibaba"
+                },
                 {
                     "major_version": "8",
                     "repoid": "rhui-custom-rhui_client_at_alibaba-rhel-8",