fix(baseapp): select txs correctly with no-op mempool (#17769)

(cherry picked from commit 63d046d)

# Conflicts:
#	CHANGELOG.md
#	baseapp/abci_utils.go
#	baseapp/abci_utils_test.go
#	baseapp/baseapp.go

CHANGELOG.md

@@ -43,6 +43,12 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
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+=======
+* (baseapp) [#17769](https://github.com/cosmos/cosmos-sdk/pull/17769) Ensure we respect block size constraints in the `DefaultProposalHandler`'s `PrepareProposal` handler when a nil or no-op mempool is used. We provide a `TxSelector` type to assist in making transaction selection generalized. We also fix a comparison bug in tx selection when `req.maxTxBytes` is reached.
+* (types) [#16583](https://github.com/cosmos/cosmos-sdk/pull/16583), [#17372](https://github.com/cosmos/cosmos-sdk/pull/17372), [#17421](https://github.com/cosmos/cosmos-sdk/pull/17421), [#17713](https://github.com/cosmos/cosmos-sdk/pull/17713) Introduce `PreBlock`, which executes in `FinalizeBlock` before `BeginBlock`. It allows the application to modify consensus parameters and have access to VE state. Note, `PreFinalizeBlockHook` is replaced by`PreBlocker`.
+* (baseapp) [#17518](https://github.com/cosmos/cosmos-sdk/pull/17518) Utilizing voting power from vote extensions (CometBFT) instead of the current bonded tokens (x/staking) to determine if a set of vote extensions are valid.
+>>>>>>> 63d046dd5 (fix(baseapp): select txs correctly with no-op mempool (#17769))
 * (config) [#17649](https://github.com/cosmos/cosmos-sdk/pull/17649) Fix `mempool.max-txs` configuration is invalid in `app.config`.
 * (mempool) [#17668](https://github.com/cosmos/cosmos-sdk/pull/17668) Fix `PriorityNonceIterator.Next()` nil pointer ref for min priority at the end of iteration.