BUG #17952: rhel-8-aarch64 yum repository for Postgres 14 is missing repodata

The following bug has been logged on the website:

Bug reference: 17952
Logged by: Antonio Borrero Granell
Email address: me(at)antoniobg(dot)com
PostgreSQL version: 14.0
Operating system: MacOs Ventura
Description:

Starting yesterday (May 31st), the yum repository folders for Red Hat 8 and
superior and aarch64 are missing the repo data. See
https://download.postgresql.org/pub/repos/yum/14/redhat/rhel-8-aarch64/.

Trying to install Postgres 14 fails with the following error:

```
> [core dev-image 5/6] RUN yum -y --setopt=tsflags=nodocs install netcdf
pigz postgresql14 && yum -y clean all --enablerepo='*':
#0 0.298 Updating Subscription Management repositories.
#0 0.298 Unable to read consumer identity
#0 0.298 Subscription Manager is operating in container mode.
#0 0.299
#0 0.299 This system is not registered with an entitlement server. You can
use subscription-manager to register.
#0 0.299
#0 9.601 Extra Packages for Enterprise Linux 8 - aarch64 1.5 MB/s | 14 MB
00:09
#0 12.25 PostgreSQL common RPMs for RHEL / Rocky 8 - aar 1.4 kB/s | 833 B
00:00
#0 12.25 PostgreSQL common RPMs for RHEL / Rocky 8 - aar 3.0 MB/s | 3.1 kB
00:00
#0 12.28 Importing GPG key 0x6EB425D5:
#0 12.28 Userid : "PostgreSQL RPM Building Project
<pgsql-pkg-yum(at)lists(dot)postgresql(dot)org>"
#0 12.28 Fingerprint: 1B09 0CE4 7562 66D7 1203 13F6 3BAC 309A 6EB4 25D5
#0 12.28 From : /etc/pki/rpm-gpg/RPM-GPG-KEY-PGDG-AARCH64
#0 13.32 PostgreSQL common RPMs for RHEL / Rocky 8 - aar 361 kB/s | 373 kB
00:01
#0 13.90 PostgreSQL 14 for RHEL / Rocky 8 - aarch64 307 B/s | 146 B
00:00
#0 13.90 Errors during downloading metadata for repository 'pgdg14':
#0 13.90 - Status code: 404 for
https://download.postgresql.org/pub/repos/yum/14/redhat/rhel-8-aarch64/repodata/repomd.xml
(IP: 217.196.149.55)
#0 13.91 Error: Failed to download metadata for repo 'pgdg14': Cannot
download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were
tried
------
failed to solve: process "/bin/sh -c yum -y --setopt=tsflags=nodocs install
netcdf pigz postgresql14 && yum -y clean all --enablerepo='*'" did not
complete successfully: exit code: 1
```