Move pympler back into the all extras (#12652)

* Move `pympler` back into the `all` extras

Undoes a change I made in #12381. I can't fully remember my reasoning,
but this changed the contents of the debian packages in a backwards
incompatible way. We're not aware of anyone who's been bitten by this,
but we still want to fix it.

To the reviewer: please be convinced that the debian packages will still
contain pympler after this change.

* Debian changelog entry to keep the linter happy

changelog.d/12652.misc

@@ -0,0 +1 @@
+Move `pympler` back in to the `all` extras.

debian/build_virtualenv

@@ -41,7 +41,6 @@ poetry export \
     --extras all \
     --extras test \
     --extras systemd \
-    --extras cache_memory \
     -o exported_requirements.txt
 deactivate
 rm -rf "$TEMP_VENV"

debian/changelog

@@ -1,3 +1,11 @@
+matrix-synapse-py3 (1.58.2) UNRELEASED; urgency=medium
+
+  * Adjust how the `exported-requirements.txt` file is generated as part of
+    the process of building these packages. This affects the package
+    maintainers only; end-users are unaffected.
+
+ -- Synapse Packaging team <packages@matrix.org>  Fri, 06 May 2022 13:49:29 +0100
+
 matrix-synapse-py3 (1.58.1) stable; urgency=medium
 
   * Include python dependencies from the `systemd` and `cache_memory` extras package groups, which

pyproject.toml

@@ -231,10 +231,11 @@ all = [
     "jaeger-client", "opentracing",
     # jwt
     "pyjwt",
-    #redis
-    "txredisapi", "hiredis"
+    # redis
+    "txredisapi", "hiredis",
+    # cache_memory
+    "pympler",
     # omitted:
-    #   - cache_memory: this is an experimental option
     #   - test: it's useful to have this separate from dev deps in the olddeps job
     #   - systemd: this is a system-based requirement
 ]