Closes https://github.com/paritytech/release-engineering/issues/6

Adds a new Github Workflow which on a new release being created, builds
and attaches all runtimes managed in this repository in two flavours:
- `dev-debug-build`: Built with the `try-runtime` feature and has
logging enabled
- `on-chain-release`: Built with the regular old `on-chain-release`
feature

The new Github Workflow could be extended in the future by the
@paritytech/release-engineering team to fully automate the release
process if they choose to, similar to how it is fully automated in the
Fellowship repo
(https://github.com/polkadot-fellows/runtimes/blob/main/.github/workflows/release.yml).

The `on-chain-release` did not exist for parachains, so I added it. 

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Tested on my fork: 
- https://github.com/liamaharon/polkadot-sdk/actions/runs/6663773523
- https://github.com/liamaharon/polkadot-sdk/releases/tag/test-6

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Co-authored-by: Chevdor <[email protected]>
Co-authored-by: Dónal Murray <[email protected]>