Merge bitcoin/bitcoin#22791: init: Fix asmap/addrman initialization order bug

724c497562 [fuzz] Add ConsumeAsmap() function (John Newbery)
5840476714 [addrman] Make m_asmap private (John Newbery)
f9002cb5db [net] Rename the copyStats arg from m_asmap to asmap (John Newbery)
f572f2b204 [addrman] Set m_asmap in CAddrMan initializer list (John Newbery)
593247872d [net] Remove CConnMan::SetAsmap() (John Newbery)
50fd77045e [init] Read/decode asmap before constructing addrman (John Newbery)

Pull request description:

  Commit 181a1207 introduced an initialization order bug: CAddrMan's m_asmap must be set before deserializing peers.dat.

  The first commit restores the correct initialization order. The remaining commits make `CAddrMan::m_asmap` usage safer:

  - don't reach into `CAddrMan`'s internal data from `CConnMan`
  - set `m_asmap` in the initializer list and make it const
  - make `m_asmap` private, and access it (as a reference to const) from a getter.

  This ensures that peers.dat deserialization must happen after setting m_asmap, since m_asmap is set during CAddrMan construction.

ACKs for top commit:
  mzumsande:
    Tested ACK 724c497562
  amitiuttarwar:
    code review but utACK 724c497562
  naumenkogs:
    utACK 724c497562
  vasild:
    ACK 724c497562
  MarcoFalke:
    review ACK 724c497562 👫

Tree-SHA512: 684a4cf9e3d4496c9997fb2bc4ec874809987055c157ec3fad1d2143b8223df52b5a0af787d028930b27388c8efeba0aeb2446cb35c337a5552ae76112ade726

src/net.h

@@ -652,7 +652,7 @@ public:
 
     void CloseSocketDisconnect();
 
-    void copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap);
+    void CopyStats(CNodeStats& stats, const std::vector<bool>& asmap);
 
     ServiceFlags GetLocalServices() const
     {
@@ -943,8 +943,6 @@ public:
     */
     std::chrono::microseconds PoissonNextSendInbound(std::chrono::microseconds now, std::chrono::seconds average_interval);
 
-    void SetAsmap(std::vector<bool> asmap) { addrman.m_asmap = std::move(asmap); }
-
     /** Return true if we should disconnect the peer for failing an inactivity check. */
     bool ShouldRunInactivityChecks(const CNode& node, std::optional<int64_t> now=std::nullopt) const;