Switch from IPFS cluster to kredits-ipfs-pinner

This removes the cluster configuration and adds deployment of Kredits
IPFS Pinner. It also switches hubot-kredits to use the normal API
endpoint again (instead of the cluster port).

Furthermore, it upgrades go-ipfs to the latest version.

nodes/andromeda.kosmos.org.json

@@ -2,7 +2,8 @@
   "run_list": [
     "role[base]",
     "kosmos-base::andromeda_firewall",
-    "role[ipfs_cluster_with_tls]",
+    "kosmos-ipfs",
+    "kosmos-ipfs::public_gateway",
     "kosmos-postgresql",
     "kosmos-mediawiki",
     "kosmos-btcpayserver::proxy",

nodes/barnard.kosmos.org.json

@@ -2,7 +2,7 @@
   "run_list": [
     "role[base]",
     "role[kredits_github]",
-    "kosmos-ipfs::cluster",
+    "kosmos-ipfs",
     "kosmos-hubot::botka_freenode",
     "kosmos-hubot::hal8000",
     "kosmos-hubot::hal8000_xmpp",