* contracts-bedrock: check initialized value in ChainAssertions

* contracts-bedrock: check initialized value in ChainAssertions

* contracts-bedrock: update Deploy script to pass vm in ChainAssertions calls

* contracts-bedrock: create assertSlotIsOne in ChainAssertions

* contracts-bedrock: replace initialized check logic by assertSlotIsOne in ChainAssertions

* contracts-bedrock: drop unnecessary _vm argument in ChainAssertions functions

* contracts-bedrock: drop redundant loadInitializedSlot in Deploy.s.sol

* contracts-bedrock: reintroduce call to checkOptimismPortal2 in ChainAssertions

* contracts-bedrock: improve error log for assertSlotIsOne in ChainAssertions

* contracts-bedrock: prepended with an underscore inputs to assertSlotIsOne in ChainAssertions

* contracts-bedrock: relabel assertSlotIsOne to assertSlotValueIsOne in ChainAssertions

* contracts-bedrock: update snapshots

* contracts-bedrock: fix error log for assertSlotValueIsOne in ChainAssertions

* contracts-bedrock: improve error string for assertSlotValueIsOne in ChainAssertions