scripted-diff: Clarify CheckFinalTxAtTip name

This checks finality at the current Tip, so clarify this in its name.

-BEGIN VERIFY SCRIPT-

 ren() { sed -i "s/\<$1\>/$2/g" $( git grep -l "$1" ./src/ ) ; }

 ren CheckSequenceLocks CheckSequenceLocksAtTip
 ren CheckFinalTx       CheckFinalTxAtTip

-END VERIFY SCRIPT-

src/validation.h

@@ -278,7 +278,7 @@ PackageMempoolAcceptResult ProcessNewPackage(CChainState& active_chainstate, CTx
 /**
  * Check if transaction will be final in the next block to be created.
  */
-bool CheckFinalTx(const CBlockIndex* active_chain_tip, const CTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
+bool CheckFinalTxAtTip(const CBlockIndex* active_chain_tip, const CTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
 
 /**
  * Check if transaction will be BIP68 final in the next block to be created on top of tip.
@@ -295,9 +295,9 @@ bool CheckFinalTx(const CBlockIndex* active_chain_tip, const CTransaction& tx) E
  * Optionally stores in LockPoints the resulting height and time calculated and the hash
  * of the block needed for calculation or skips the calculation and uses the LockPoints
  * passed in for evaluation.
- * The LockPoints should not be considered valid if CheckSequenceLocks returns false.
+ * The LockPoints should not be considered valid if CheckSequenceLocksAtTip returns false.
  */
-bool CheckSequenceLocks(CBlockIndex* tip,
+bool CheckSequenceLocksAtTip(CBlockIndex* tip,
                         const CCoinsView& coins_view,
                         const CTransaction& tx,
                         LockPoints* lp = nullptr,