Merge bitcoin/bitcoin#23002: Make descriptor wallets by default

9c1052a521 wallet: Default new wallets to descriptor wallets (Andrew Chow)
f19ad40463 rpc, wallet: Descriptor wallets are no longer experimental (Andrew Chow)

Pull request description:

  Changes the default wallet type from legacy to descriptors. Descriptor wallets will now by the default type. Additionally, descriptor wallets will no longer be marked as experimental.

  This follows the timeline proposed in #20160

ACKs for top commit:
  lsilva01:
    Tested ACK https://github.com/bitcoin/bitcoin/pull/23002/commits/9c1052a5218e191fd23c0d9fc06f2fca34b03411 on Ubuntu 20.04
  prayank23:
    tACK https://github.com/bitcoin/bitcoin/pull/23002/commits/9c1052a5218e191fd23c0d9fc06f2fca34b03411
  meshcollider:
    Code review ACK 9c1052a521

Tree-SHA512: 834e6fec88e0c18673af7ebe135bd5333694d1be502164eb93a90e3e76c27974165aa4e59426945100c88e4eca07356e16886ef5b05cf789683ecb23fc71a12a

src/qt/forms/createwalletdialog.ui

@@ -107,6 +107,9 @@
         <property name="text">
          <string>Descriptor Wallet</string>
         </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
        </widget>
       </item>
       <item>