Modernize custom filtering

[hebasto]

In QSortFilterProxyModel::invalidateFilter() is scheduled for deprecation in Qt 6.13. and emits warnings in Qt 6.10

QSortFilterProxyModel::beginFilterChange() was introduced in Qt 6.9.

QSortFilterProxyModel::endFilterChange() was introduced in Qt 6.10.

Fixes bitcoin/bitcoin#33571.

[DrahtBot]

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[RandyMcMillan]

macOS 14.7.7 (23H723) - confirming build not broken with this change.

git at DeepSpaceM1 in /Users/Shared/bitcoincore-dev/.github/bitcoin/pr899.02 on 1916/918471/328849/b510893d00/1a11cacf52-1a11cac [?$]
$ ./bin/test_bitcoin-qt 
********* Start testing of AppTests *********
Config: Using QtTest library 6.9.2, Qt 6.9.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Apple LLVM 16.0.0 (clang-1600.0.26.6)), macos 14.7.7
PASS   : AppTests::initTestCase()
QWARN  : AppTests::appTests() Skipping AppTests on mac build with 'minimal' platform set due to Qt bugs. To run AppTests, invoke with 'QT_QPA_PLATFORM=cocoa test_bitcoin-qt' on mac, or else use a linux or windows build.
PASS   : AppTests::appTests()
PASS   : AppTests::cleanupTestCase()
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 1ms
********* Finished testing of AppTests *********
********* Start testing of OptionTests *********
Config: Using QtTest library 6.9.2, Qt 6.9.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Apple LLVM 16.0.0 (clang-1600.0.26.6)), macos 14.7.7
PASS   : OptionTests::initTestCase()
PASS   : OptionTests::migrateSettings()
PASS   : OptionTests::integerGetArgBug()
PASS   : OptionTests::parametersInteraction()
PASS   : OptionTests::extractFilter()
PASS   : OptionTests::cleanupTestCase()
Totals: 6 passed, 0 failed, 0 skipped, 0 blacklisted, 11ms
********* Finished testing of OptionTests *********
********* Start testing of URITests *********
Config: Using QtTest library 6.9.2, Qt 6.9.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Apple LLVM 16.0.0 (clang-1600.0.26.6)), macos 14.7.7
PASS   : URITests::initTestCase()
PASS   : URITests::uriTests()
PASS   : URITests::cleanupTestCase()
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 0ms
********* Finished testing of URITests *********
********* Start testing of RPCNestedTests *********
Config: Using QtTest library 6.9.2, Qt 6.9.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Apple LLVM 16.0.0 (clang-1600.0.26.6)), macos 14.7.7
PASS   : RPCNestedTests::initTestCase()
PASS   : RPCNestedTests::rpcNestedTests()
PASS   : RPCNestedTests::cleanupTestCase()
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 7ms
********* Finished testing of RPCNestedTests *********
********* Start testing of WalletTests *********
Config: Using QtTest library 6.9.2, Qt 6.9.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Apple LLVM 16.0.0 (clang-1600.0.26.6)), macos 14.7.7
PASS   : WalletTests::initTestCase()
QWARN  : WalletTests::walletTests() Skipping WalletTests on mac build with 'minimal' platform set due to Qt bugs. To run AppTests, invoke with 'QT_QPA_PLATFORM=cocoa test_bitcoin-qt' on mac, or else use a linux or windows build.
PASS   : WalletTests::walletTests()
PASS   : WalletTests::cleanupTestCase()
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 0ms
********* Finished testing of WalletTests *********
********* Start testing of AddressBookTests *********
Config: Using QtTest library 6.9.2, Qt 6.9.2 (arm64-little_endian-lp64 shared (dynamic) release build; by Apple LLVM 16.0.0 (clang-1600.0.26.6)), macos 14.7.7
PASS   : AddressBookTests::initTestCase()
QWARN  : AddressBookTests::addressBookTests() Skipping AddressBookTests on mac build with 'minimal' platform set due to Qt bugs. To run AppTests, invoke with 'QT_QPA_PLATFORM=cocoa test_bitcoin-qt' on mac, or else use a linux or windows build.
PASS   : AddressBookTests::addressBookTests()
PASS   : AddressBookTests::cleanupTestCase()
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 0ms
********* Finished testing of AddressBookTests *********

All tests passed.

[RandyMcMillan]

@hebasto - while testing this PR - I noticed this can be updated.

#900