Rollback to nvm 0.33.11 and specify default Node version (16) (#732)

* Revert "install latest nvm from an up to date source"

This reverts commit de105e1.

* fix: Don't install a system version of Node

`nvm --lts` appears to be installing Node v18.

Node 18 has switched the version of `glibc`, and the version it wants does not seem to be present on the AMI.

Given Node 18 enters a formal LTS in Oct 2022, and builds should be individually managing their node version,
this change removes any system wide install of node.

See: nodejs/node#42659

* Explicitly install latest Node 16 via NVM

* Specify default alias

We were getting errors when attempting to start TeamCity:

N/A: version "N/A -> N/A" is not yet installed.
teamcityagent.service: Control process exited, code=exited status=3
You need to run "nvm install N/A" to install it before using it.

It looks like the default version is not wired up correctly:

nvm ls
v16.15.0
default -> lts/Gallium (-> N/A)

Co-authored-by: Jacob Winch <jacob.winch@guardian.co.uk>

roles/teamcity-agent/defaults/main.yml

@@ -1,2 +1,2 @@
 ---
-nvm_version: 0.39.1
+nvm_version: 0.33.11

roles/teamcity-agent/tasks/main.yml

@@ -66,10 +66,11 @@
 - name: install nvm
   shell: |
     set -e
-    curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v{{nvm_version}}/install.sh | bash
+    curl -o- https://raw.githubusercontent.com/creationix/nvm/v{{nvm_version}}/install.sh | bash
     source /opt/teamcity/.nvm/nvm.sh
-    nvm install node
-    nvm install --lts
+    # Gallium is Node 16
+    nvm install --lts=Gallium
+    nvm alias default 16
   become: yes
   become_user: teamcity
   args: