Influxdb: use stable RHEL repo

Switch the RHEL repo to the stable channel as per [1]. Use new GPG.
Telegraf arm64 builds are enabled again, as binaries exists.

[1] https://repos.influxdata.com/stable/x86_64/

Change-Id: Ie4f6f15404f6965df51f3214506ae9f8bb9b61e7
Signed-off-by: Bartosz Bezak <[email protected]>
(cherry picked from commit 444a81b)

Author: bbezak

docker/base/influxdb.repo

@@ -1,6 +1,6 @@
 [influxdb]
 name = InfluxDB Repository - RHEL $releasever
-baseurl = https://repos.influxdata.com/rhel/$releasever/$basearch/stable
+baseurl = https://repos.influxdata.com/stable/$basearch/main
 enabled = 0
 gpgcheck = 1
-gpgkey = https://repos.influxdata.com/influxdata-archive_compat.key
+gpgkey = https://repos.influxdata.com/influxdata-archive.key

kolla/image/unbuildable.py

@@ -49,6 +49,5 @@
     },
 
     'centos+aarch64': {
-        "telegraf",      # no binary package
     },
 }