Merge fixAMMClawbackRounding amendment into featureAMMClawback amendment

Due to rounding, the LPTokenBalance of the last LP might not match the LP's trustline balance. This was fixed for `AMMWithdraw` in `fixAMMv1_1` by adjusting the LPTokenBalance to be the same as the trustline balance. Since `AMMClawback` is also performing a withdrawal, we need to adjust LPTokenBalance as well in `AMMClawback.`

This change includes:
1. Refactored `verifyAndAdjustLPTokenBalance` function in `AMMUtils`, which both`AMMWithdraw` and `AMMClawback` call to adjust LPTokenBalance.
2. Added the unit test `testLastHolderLPTokenBalance` to test the scenario.
3. Modify the existing unit tests for `fixAMMClawbackRounding`.

src/xrpld/app/ledger/detail/LedgerMaster.cpp

@@ -310,28 +310,12 @@ LedgerMaster::setValidLedger(std::shared_ptr<Ledger const> const& l)
             if (auto const first =
                     app_.getAmendmentTable().firstUnsupportedExpected())
             {
-                using namespace std::chrono_literals;
-                auto const now = app_.timeKeeper().closeTime();
-                if (*first > now && (*first - now) <= 1min)
-                {
-                    // Shut down just before the amendment activates to
-                    // avoid processing ledgers with unknown fields.
-                    JLOG(m_journal.error())
-                        << "Unsupported amendment activating imminently "
-                           "at "
-                        << to_string(*first) << ". Shutting down.";
-                    app_.getOPs().setAmendmentBlocked();
-                }
-                else
-                {
-                    JLOG(m_journal.error())
-                        << "One or more unsupported amendments "
-                           "reached majority. Upgrade before "
-                        << to_string(*first)
-                        << " to prevent your server from "
-                           "becoming amendment blocked.";
-                    app_.getOPs().setAmendmentWarned();
-                }
+                JLOG(m_journal.error()) << "One or more unsupported amendments "
+                                           "reached majority. Upgrade before "
+                                        << to_string(*first)
+                                        << " to prevent your server from "
+                                           "becoming amendment blocked.";
+                app_.getOPs().setAmendmentWarned();
             }
             else
                 app_.getOPs().clearAmendmentWarned();

src/xrpld/app/misc/NetworkOPs.cpp

@@ -1634,16 +1634,6 @@ NetworkOPsImp::setAmendmentBlocked()
 {
     amendmentBlocked_ = true;
     setMode(OperatingMode::CONNECTED);
-    if (!app_.config().standalone())
-    {
-        JLOG(m_journal.fatal())
-            << "One or more unsupported amendments activated. "
-               "Shutting down. Upgrade the server to remain "
-               "compatible with the network.";
-        app_.signalStop(
-            "One or more unsupported amendments activated. "
-            "Server must be upgraded to remain compatible with the network.");
-    }
 }
 
 inline bool
@@ -1799,23 +1789,8 @@ NetworkOPsImp::switchLastClosedLedger(
 
     clearNeedNetworkLedger();
 
-    // Update fee computations. May throw if the ledger contains
-    // transactions with fields unknown to this binary (e.g. after an
-    // unsupported amendment activates). Catch to allow graceful shutdown.
-    //@@start process-closed-ledger-catch
-    try
-    {
-        app_.getTxQ().processClosedLedger(app_, *newLCL, true);
-    }
-    catch (std::runtime_error const& e)
-    {
-        if (!amendmentBlocked_)
-            throw;
-        JLOG(m_journal.error())
-            << "Failed to process closed ledger: " << e.what();
-        return;
-    }
-    //@@end process-closed-ledger-catch
+    // Update fee computations.
+    app_.getTxQ().processClosedLedger(app_, *newLCL, true);
 
     // Caller must own master lock
     {
@@ -2474,7 +2449,7 @@ NetworkOPsImp::getServerInfo(bool human, bool admin, bool counters)
                 "may be incorrectly configured or some [validator_list_sites] "
                 "may be unreachable.";
         }
-        if (isAmendmentWarned())
+        if (admin && isAmendmentWarned())
         {
             Json::Value& w = warnings.append(Json::objectValue);
             w[jss::id] = warnRPC_UNSUPPORTED_MAJORITY;
@@ -2918,7 +2893,6 @@ NetworkOPsImp::pubLedger(std::shared_ptr<ReadView const> const& lpAccepted)
     // Ledgers are published only when they acquire sufficient validations
     // Holes are filled across connection loss or other catastrophe
 
-    //@@start pubLedger-accepted-ledger-construction
     std::shared_ptr<AcceptedLedger> alpAccepted =
         app_.getAcceptedLedgerCache().fetch(lpAccepted->info().hash);
     if (!alpAccepted)
@@ -2927,7 +2901,6 @@ NetworkOPsImp::pubLedger(std::shared_ptr<ReadView const> const& lpAccepted)
         app_.getAcceptedLedgerCache().canonicalize_replace_client(
             lpAccepted->info().hash, alpAccepted);
     }
-    //@@end pubLedger-accepted-ledger-construction
 
     XRPL_ASSERT(
         alpAccepted->getLedger().get() == lpAccepted.get(),