ctb: Specify auth roles for L1 contracts (#8659)

* ctb: Specify auth roles for L1 contracts

* add governance and ProxyAdmin to specs

* specs: replace BRIDGE role with MESSENGER

* contracts-bedrock: Add overloads to _addSpec (#8722)

Allows for default values of no pausability and no auth.

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Co-authored-by: Maurelian <maurelian@protonmail.ch>