send confirmProcessedParentchainBlock extrinsics for TargetA/B as well to Integritee

[brenzi]

we can't confirm blocks on TargetA/B as they have no suitable dispatchabe. (except maybe system.remark()? but that's expensive)
needs changes to EnclaveBridge pallet to specify Parentchain (generic genesis hash?)

the current architecture is not well designed for this, because the IndirectCallsExecutor is per parentchain and has no access to the extrinsic factory of other parentchains

might be easier to route this via app-libs STF