Backport: Fix multiple cores assignments 1.7 (#3469) (#3497)

Backport from `release-polkadot-v1.7.2`.

Expected patches for (1.7.0):

- polkadot-node-core-backing `8.0.1`
- polkadot-node-core-provisioner `8.0.1`
- polkadot-statement-table `8.0.1`
- polkadot-primitives `8.0.1`
- polkadot-runtime-parachains `8.0.1`

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Signed-off-by: Andrei Sandu <[email protected]>
Signed-off-by: alindima <[email protected]>
Co-authored-by: eskimor <[email protected]>
Co-authored-by: Andrei Sandu <[email protected]>
Co-authored-by: alindima <[email protected]>
Co-authored-by: eskimor <[email protected]>