add sv update for configured bus

[jonenst]

Describe the current behavior

no endpoint to send only the SV (V angle) of configured bus

Describe the expected behavior

existing endpoint to send only the SV (V angle) of configured bus

Describe the motivation

symmetry with other equipments

Extra Information

network-store-server/src/main/java/com/powsybl/network/store/server/NetworkStoreController.java
Line 1404

  @PutMapping(value = "/{networkId}/configured-buses")

• //TODO add here configured-bus sv for symmetry (v and angle)

• @PutMapping(value = "/{networkId}/configured-buses/sv")
  

  @DeleteMapping(value = "/{networkId}/{variantNum}/configured-buses/{busId}", produces = APPLICATION_JSON_VALUE)

see powsybl/powsybl-network-store#484