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<!-- Describe the issue -->

**Expected behavior**

When I make a json-rpc call to `getblock` with:

```json
{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "getblock",
    "params": ["37351c7060ec3a149af1bbc9ebcc436c0ee652f96559ef1fe9bc45d11000f061", "2"]
}
```
An error should be returned with the [expected data type](https://developer.bitcoin.org/reference/rpc/getblock.html#argument-2-verbosity)(number) for `verbosity`.
<!--- What behavior did you expect? -->

**Actual behavior**

<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->

Received `"message": "JSON value is not a boolean as expected"` as an error message which is not the [expected data type](number) (https://developer.bitcoin.org/reference/rpc/getblock.html#argument-2-verbosity) for `verbosity`

**To reproduce**

Use this curl on a node

```
curl --location --request POST "127.0.0.1:8332" \
--header "Content-Type: application/json" \
--header "Authorization: Basic YOUR_AUTH" \
--data "{
    \"jsonrpc\": \"1.0\",
    \"id\": \"curltest\",
    \"method\": \"getblock\",
    \"params\": [\"37351c7060ec3a149af1bbc9ebcc436c0ee652f96559ef1fe9bc45d11000f061\", \"2\"]
}"
```

**System information**
* self-compiled

<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->

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<!-- GUI-related issue? What is your operating system and its version? If Linux, what is your desktop environment and graphical shell? -->

<!-- Any extra information that might be useful in the debugging process. -->
<!--- This is normally the contents of a `debug.log` or `config.log` file. Raw text or a link to a pastebin type site are preferred. -->

CChain& active_chain = chainman.ActiveChain();
    /*
     * Idea: The set of chain tips is the active chain tip, plus orphan blocks which do not have another orphan building off of them.
     * Algorithm:
     *  - Make one pass through BlockIndex(), picking out the orphan blocks, and also storing a set of the orphan block's pprev pointers.
     *  - Iterate through the orphan blocks. If the block isn't pointed to by another orphan, it is a chain tip.
     *  - Add the active chain tip
     */
    std::set<const CBlockIndex*, CompareBlocksByHeight> setTips;
    std::set<const CBlockIndex*> setOrphans;
    std::set<const CBlockIndex*> setPrevs;
    for (const std::pair<const uint256, CBlockIndex*>& item : chainman.BlockIndex()) {
        if (!active_chain.Contains(item.second)) {
            setOrphans.insert(item.second);
            setPrevs.insert(item.second->pprev);
        }
    }
    for (std::set<const CBlockIndex*>::iterator it = setOrphans.begin(); it != setOrphans.end(); ++it) {
        if (setPrevs.erase(*it) == 0) {
            setTips.insert(*it);
        }
    }
    
    setTips.insert(active_chain.Tip());
    
    UniValue res(UniValue::VARR);
    for (const CBlockIndex* block : setTips) {
        UniValue obj(UniValue::VOBJ);
        obj.pushKV("height", block->nHeight);
        obj.pushKV("hash", block->phashBlock->GetHex());