home-manager currently has a pinned stateVersion on all hosts, even though many
of the hosts were initialised after that point. Create a condition such that
any hosts initialised after 24.05 (the latest currently host) will use that
version in home-manager instead of pinning to 22.11.
Any future users can pass the stateVersion through without the `if`.
Test plan:
```
# system.stateVersion = "23.11";
$ nix eval '.#nixosConfigurations."boron.cx.ts.hillion.co.uk".config.home-manager.users.root.home.stateVersion'
"22.11"
```
```
# system.stateVersion = "24.05";
$ nix eval '.#nixosConfigurations."phoenix.st.ts.hillion.co.uk".config.home-manager.users.root.home.stateVersion'
"22.11"
```
```
# system.stateVersion = "24.11"; // no-commit change
$ nix eval '.#nixosConfigurations."phoenix.st.ts.hillion.co.uk".config.home-manager.users.root.home.stateVersion'
nix eval '.#nixosConfigurations."phoenix.st.ts.hillion.co.uk".config.home-manager.users.root.home.stateVersion'
error:
...
(stack trace truncated; use '--show-trace' to show the full trace)
error: A definition for option `home-manager.users.root.home.stateVersion' is not of type `one of "18.09", "19.03", "19.09", "20.03", "20.09", "21.03", "21.05", "21.11", "22.05", "22.11", "23.05", "23.11", "24.05"'. Definition values:
- In `/nix/store/8dhsknmlnv571bg100j9v9yqq1nnh346-source/modules/home/default.nix': "24.11"
```
