Remove Radiumblock endpoints for Moonbeam, Monriver and Moonbase (#12236)

* Update productionRelayKusama.ts

Add RadiumBlock endpoint to People Kusama

* Update productionRelayPolkadot.ts

Add RadiumBlock endpoint to Coretime Polkadot

* Add Radiumblock endpoints to People Kusama, People Polkadot and Coretime Polkadot

Please consider adding Radiumblock endpoints to People Kusama and Coretime Polkadot.

* Update productionRelayKusama.ts

* Update productionRelayPolkadot.ts

* fix duplicates

* Update productionRelayKusama.ts

* Update productionRelayPolkadot.ts

* Update testing.ts

* Update testing.ts

* Update testingRelayWestend.ts

* Update testingRelayWestend.ts

* Update testingRelayWestend.ts

---------

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>