script: make IsPushdataOp non-static

We'll need it for Miniscript

src/script/standard.cpp

@@ -91,11 +91,6 @@ static constexpr bool IsSmallInteger(opcodetype opcode)
     return opcode >= OP_1 && opcode <= OP_16;
 }
 
-static constexpr bool IsPushdataOp(opcodetype opcode)
-{
-    return opcode > OP_FALSE && opcode <= OP_PUSHDATA4;
-}
-
 /** Retrieve a minimally-encoded number in range [min,max] from an (opcode, data) pair,
  *  whether it's OP_n or through a push. */
 static std::optional<int> GetScriptNumber(opcodetype opcode, valtype data, int min, int max)

src/script/standard.h

@@ -162,6 +162,11 @@ bool IsValidDestination(const CTxDestination& dest);
 /** Get the name of a TxoutType as a string */
 std::string GetTxnOutputType(TxoutType t);
 
+constexpr bool IsPushdataOp(opcodetype opcode)
+{
+    return opcode > OP_FALSE && opcode <= OP_PUSHDATA4;
+}
+
 /**
  * Parse a scriptPubKey and identify script type for standard scripts. If
  * successful, returns script type and parsed pubkeys or hashes, depending on