Synchronize templates (#4040)

- Progresses https://github.com/paritytech/polkadot-sdk/issues/3155

### What's inside

A job, that will take each of the three
[templates](https://github.com/paritytech/polkadot-sdk/tree/master/templates),
yank them out of the monorepo workspace, and push to individual
repositories
([1](https://github.com/paritytech/polkadot-sdk-minimal-template),
[2](https://github.com/paritytech/polkadot-sdk-parachain-template),
[3](https://github.com/paritytech/polkadot-sdk-solochain-template)).

In case the build/test does not succeed, a PR such as [this
one](https://github.com/paritytech-stg/polkadot-sdk-solochain-template/pull/2)
gets created instead.

I'm proposing a manual dispatch trigger for now - so we can test and
iterate faster - and change it to fully automatic triggered by releases
later.

The manual trigger looks like this:

<img width="340px"
src="https://github.com/paritytech/polkadot-sdk/assets/12039224/e87e0fda-23a3-4735-9035-af801e8417fc"/>

### How it works

The job replaces dependencies [referenced by
git](https://github.com/paritytech/polkadot-sdk/blob/d733c77ee2d2e8e2d5205c552a5efb2e5b5242c8/templates/minimal/pallets/template/Cargo.toml#L25)
with a reference to released crates using
[psvm](https://github.com/paritytech/psvm).

It creates a new workspace for the template, and adapts what's needed
from the `polkadot-sdk` workspace.

### See the results

The action has been tried out in staging, and the results can be
observed here:

- [minimal
stg](https://github.com/paritytech-stg/polkadot-sdk-minimal-template/)
- [parachain
stg](https://github.com/paritytech-stg/polkadot-sdk-parachain-template/)
- [solochain
stg](https://github.com/paritytech-stg/polkadot-sdk-solochain-template/)

These are based on the `1.9.0` release (using `release-crates-io-v1.9.0`
branch).