Merge #20750: [Bundle 2/n] Prune g_chainman usage in mempool-related validation functions

e8ae1db864 style-only: Make AcceptToMemoryPool signature readable (Carl Dong)
8f5c100064 style-only: Make CheckSequenceLock signature readable (Carl Dong)
8c824819c8 validation: Use *this in CChainState::LoadMempool (Carl Dong)
0a9a24d8c7 validation: Pass in chainstate to UpdateMempoolForReorg (Carl Dong)
7142018812 validation: Pass in chainstate to CTxMemPool::removeForReorg (Carl Dong)
71734c65dc validation: Pass in chain to ::TestLockPointValidity (Carl Dong)
120aaba9ac tree-wide: Fix erroneous AcceptToMemoryPool replacements (Carl Dong)
417dafc1ee validation: Remove old AcceptToMemoryPool w/o chainstate param (Carl Dong)
3704433c4f scripted-diff: Invoke ::AcceptToMemoryPool with chainstate (Carl Dong)
229bc37b5f validation: Pass in chainstate to ::AcceptToMemoryPool (Carl Dong)
d0da7ea57a validation: Pass in chainstate to ::LoadMempool (Carl Dong)
3a205c43dc validation: Pass in chainstate to AcceptToMemoryPoolWithTime (Carl Dong)
d8a816329c validation: Add chainstate member to MemPoolAccept (Carl Dong)
4c15942b79 validation: Pass in chainstate to ::CheckSequenceLocks (Carl Dong)
577b774d0c validation: Remove old CheckFinalTx w/o chain tip param (Carl Dong)
7031cf89db scripted-diff: Invoke ::CheckFinalTx with chain tip (Carl Dong)
d015eaa550 validation: Pass in chain tip to ::CheckFinalTx (Carl Dong)
252b489c9f validation: Pass in coins tip to CheckInputsFromMempoolAndCache (Carl Dong)
73a6d2b7be validation: Pass in chainstate to IsCurrentForFeeEstimation (Carl Dong)
d1f932b0b0 validation: Pass in coins cache to ::LimitMempoolSize (Carl Dong)

Pull request description:

  Overall PR: #20158 (tree-wide: De-globalize ChainstateManager)

  Note to reviewers:
  1. This bundle may _apparently_ introduce usage of `g_chainman` or `::Chain(state|)Active()` globals, but these are resolved later on in the overall PR. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
  2. There may be seemingly obvious local references to `ChainstateManager` or other validation objects which are not being used in callers of the current function in question, this is done intentionally to **_keep each commit centered around one function/method_** to ease review and to make the overall change systematic. We don't assume anything about our callers. Rest assured that once we are considering that particular caller in later commits, we will use the obvious local references. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
  3. When changing a function/method that has many callers (e.g. `LookupBlockIndex` with 55 callers), it is sometimes easier (and less error-prone) to use a scripted-diff. When doing so, there will be 3 commits in sequence so that every commit compiles like so:
  	1. Add `new_function`, make `old_function` a wrapper of `new_function`, divert all calls to `old_function` to `new_function` **in the local module only**
  	2. Scripted-diff to divert all calls to `old_function` to `new_function` **in the rest of the codebase**
  	3. Remove `old_function`

ACKs for top commit:
  glozow:
    reACK e8ae1db864 via `git range-diff 15f0042...e8ae1db`, only change is fixing ATMP call from conflict
  MarcoFalke:
    ACK e8ae1db864 📣

Tree-SHA512: 6af50f04940a69c5c3d3796a24f32f963fa02503cdc1155cc11fff832a99172b407cd163a19793080a5af98580f051b48195b62ec4a797ba2763b4883174153d

src/test/validation_block_tests.cpp

@@ -273,7 +273,7 @@ BOOST_AUTO_TEST_CASE(mempool_locks_reorg)
         {
             LOCK(cs_main);
             for (const auto& tx : txs) {
-                const MempoolAcceptResult result = AcceptToMemoryPool(*m_node.mempool, tx, false /* bypass_limits */);
+                const MempoolAcceptResult result = AcceptToMemoryPool(::ChainstateActive(), *m_node.mempool, tx, false /* bypass_limits */);
                 BOOST_REQUIRE(result.m_result_type == MempoolAcceptResult::ResultType::VALID);
             }
         }