chore: rename validation associated hooks to module entity associated hooks

[howydev]

The term "validation associated hooks" could potentially be confusing as it sounds like the hooks are run whenever a specific validation function are run. However, the hooks are actually associated to an entity, referenced by a (validation module + entity id) pair

I suggest we improve the framing to be around "entity associated hooks" as that's more accurate. This PR changes the variable names and comments to use "module entity associated hooks"

[octane-security-app]

Summary by Octane

New Contracts

No new contracts were added in this PR.

Updated Contracts

• AccountStorage.sol: Modified execution hooks to be entity-specific, triggering when the validation is used.
• ReferenceModularAccount.sol: Renamed "Validator" to "Entity" in execution and runtime hook logic, improving clarity.
• Constants.sol: Changed "validation-associated" to "entity-associated" hooks, indicating broader functionality.
• IExecutionHookModule.sol: The smart contract modification changes "validation-associated hooks" to "entity associated hooks" in the pre-execution functionality.

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🔗 Commit Hash: dd3fe66