Revert previous commit, stick with Alpine 3.16 and Erlang/OTP 24 (#3983)

Alpine 3.17 includes Erlang/OTP 25, and it segfaults when
used in QEMU for arm64.

Revert "Update Alpine to 3.17 to get Elixir 1.14 required by recent libraries"
This reverts commit 43cae92.

.github/container/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.17 AS build
+FROM alpine:3.16 AS build
 ARG VERSION=master
 
 RUN apk upgrade --update musl \
@@ -63,7 +63,7 @@ RUN export PEM=/opt/ejabberd/conf/server.pem \
         \ncertfiles: \
         \n  - /opt/ejabberd/conf/server.pem' "/opt/ejabberd/conf/ejabberd.yml"
 
-FROM alpine:3.17
+FROM alpine:3.16
 ENV HOME=/opt/ejabberd
 ARG VERSION=master