fix(I5): natspec (#516)

**Motivation:**

Update incorrect natspec 

**Modifications:**

- Clarify `KeyRegistrar` usage
- Clarify `calculateOperatorTable` usage

**Result:**

Clearer natspec

Author: ypatil12

src/interfaces/IBN254TableCalculator.sol

@@ -12,7 +12,7 @@ interface IBN254TableCalculator is IOperatorTableCalculator, IOperatorTableCalcu
      * @notice calculates the operatorInfos for a given operatorSet
      * @param operatorSet the operatorSet to calculate the operator table for
      * @return operatorSetInfo the operatorSetInfo for the given operatorSet
-     * @dev The output of this function is converted to bytes via the `calculateOperatorTableBytes` function
+     * @dev The output of this function is used by the multichain protocol to transport operator stake weights to destination chains
      */
     function calculateOperatorTable(
         OperatorSet calldata operatorSet

src/interfaces/IECDSATableCalculator.sol

@@ -12,7 +12,7 @@ interface IECDSATableCalculator is IOperatorTableCalculator, IOperatorTableCalcu
      * @notice calculates the operatorInfos for a given operatorSet
      * @param operatorSet the operatorSet to calculate the operator table for
      * @return operatorInfos the list of operatorInfos for the given operatorSet
-     * @dev The output of this function is converted to bytes via the `calculateOperatorTableBytes` function
+     * @dev The output of this function is used by the multichain protocol to transport operator stake weights to destination chains
      */
     function calculateOperatorTable(
         OperatorSet calldata operatorSet

src/middlewareV2/registrar/AVSRegistrar.sol

@@ -41,7 +41,7 @@ contract AVSRegistrar is Initializable, AVSRegistrarStorage {
     ) external virtual onlyAllocationManager {
         _beforeRegisterOperator(operator, operatorSetIds, data);
 
-        // Check that the operator has a valid key and update key if needed
+        // Check that the operator has a valid key
         _validateOperatorKeys(operator, operatorSetIds);
 
         _afterRegisterOperator(operator, operatorSetIds, data);
@@ -81,10 +81,9 @@ contract AVSRegistrar is Initializable, AVSRegistrarStorage {
      */
 
     /**
-     * @notice Validates that the operator has registered a key for the given operator sets
+     * @notice Validates that the operator has registered a key for the given operator sets in the `KeyRegistrar`
      * @param operator The operator to validate
      * @param operatorSetIds The operator sets to validate
-     * @dev This function assumes the operator has already registered a key in the Key Registrar
      */
     function _validateOperatorKeys(
         address operator,