Create Subprojects to track each version of Vault

Alvin Huang
2022-07-18T15:49:47Z

## Onboarding question

In an effort to maintain multiple LTS versions of our software at HashiCorp moving forward similar to Istio's [repo](https://repo1.dso.mil/dsop/opensource/istio), we would like to request the following subprojects created under `Iron Bank Containers > Hashicorp > vault` to set this up:

* 1.12
* 1.11
* 1.10
* 1.9

The final folder structure we want is something like:

```
Hashicorp
-->vault
---->(this current project)
---->1.12
---->1.11
---->1.10
---->1.9
```
We will eventually archive the current project/tags in a follow up issue after these new tags are created.
cc: @mariano

/cc @ironbank-notifications/onboarding