The PHP 8.2 container has deflate enabled in Apache2, disable it.

This is causing a test to fail because we're being sent a gzip compressed
result. My reading of the curl manpage says that it should be decompressed
by curl, but it isn't. Let's just disable the deflate module. Here is what
we're getting:

Displaying diff for test 0548-iCal-PROPFIND
=======================================
--- tests/regression-suite/0548-iCal-PROPFIND.result	2022-12-10 00:43:52.898403110 +0000
+++ tests/regression-suite/results/0548-iCal-PROPFIND	2022-12-10 00:45:11.378242838 +0000
@@ -1,1233 +1,12 @@
-HTTP/1.1 207 Multi-Status
+HTTP/1.1 200 OK
 Date: Dow, 01 Jan 2000 00:00:00 GMT
 DAV: 1, 2, 3, access-control, calendar-access, calendar-schedule
 DAV: extended-mkcol, bind, addressbook, calendar-auto-schedule, calendar-proxy
-ETag: "ae8aac5229a8a5d9ee7c86100322162d"
-Content-Length: 28703
-Content-Type: text/xml; charset="utf-8"
+Content-Encoding: gzip
+Content-Length: 2042
+Content-Type: text/html; charset=UTF-8

.gitlab-ci.yml

@@ -221,6 +221,7 @@ test_bullseye_latestphp:
     - su postgres -c 'createuser testrunner --superuser'
     - pg_ctlcluster 13 main restart
     - a2enmod rewrite
+    - a2dismod -f deflate
     - apache2ctl start
     - useradd testrunner
     - cd testing && su testrunner -c 'IS_CI=yes ALLSUITES="regression-suite binding carddav scheduling" ./run_regressions.sh all x'