Make tcpsocket readiness and liveness configurable

Change-Id: If0c466aa5a0b64fff0ed7cee037bd3cf8672ec46
Signed-off-by: Guillermo Calvino <guillermo.calvino@canonical.com>
diff --git a/installers/charm/prometheus/charmcraft.yaml b/installers/charm/prometheus/charmcraft.yaml
index 87d0463..d677a76 100644
--- a/installers/charm/prometheus/charmcraft.yaml
+++ b/installers/charm/prometheus/charmcraft.yaml
@@ -34,8 +34,7 @@
           - arm64
 parts:
   charm:
+    charm-binary-python-packages: [cryptography, bcrypt]
     build-packages:
-      - cargo
       - git
       - libffi-dev
-      - rustc