Support DynamicMPT XLS-94d (#5705)

* extends the functionality of the MPTokenIssuanceSet transaction, allowing the issuer to update fields or flags that were explicitly marked as mutable during creation.

include/xrpl/protocol/detail/transactions.macro

@@ -548,6 +548,7 @@ TRANSACTION(ttMPTOKEN_ISSUANCE_CREATE, 54, MPTokenIssuanceCreate,
     {sfMaximumAmount, soeOPTIONAL},
     {sfMPTokenMetadata, soeOPTIONAL},
     {sfDomainID, soeOPTIONAL},
+    {sfMutableFlags, soeOPTIONAL},
 }))
 
 /** This transaction type destroys a MPTokensIssuance instance */
@@ -566,6 +567,9 @@ TRANSACTION(ttMPTOKEN_ISSUANCE_SET, 56, MPTokenIssuanceSet,
     {sfMPTokenIssuanceID, soeREQUIRED},
     {sfHolder, soeOPTIONAL},
     {sfDomainID, soeOPTIONAL},
+    {sfMPTokenMetadata, soeOPTIONAL},
+    {sfTransferFee, soeOPTIONAL},
+    {sfMutableFlags, soeOPTIONAL},
 }))
 
 /** This transaction type authorizes a MPToken instance */