change use of errors.Wrap to fmt.Errorf with %w verb

Closes #4603

Commands used (VIM):

```
:args `rg -l errors.Wrap`
:argdo normal @q | update
```

where q is a macros rewriting the `errors.Wrap` to `fmt.Errorf`.

state/txindex/kv/kv.go

@@ -9,8 +9,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/pkg/errors"
-
 	dbm "github.com/tendermint/tm-db"
 
 	"github.com/tendermint/tendermint/libs/pubsub/query"
@@ -186,18 +184,18 @@ func (txi *TxIndex) Search(ctx context.Context, q *query.Query) ([]*types.TxResu
 	// get a list of conditions (like "tx.height > 5")
 	conditions, err := q.Conditions()
 	if err != nil {
-		return nil, errors.Wrap(err, "error during parsing conditions from query")
+		return nil, fmt.Errorf("error during parsing conditions from query: %w", err)
 	}
 
 	// if there is a hash condition, return the result immediately
 	hash, ok, err := lookForHash(conditions)
 	if err != nil {
-		return nil, errors.Wrap(err, "error during searching for a hash in the query")
+		return nil, fmt.Errorf("error during searching for a hash in the query: %w", err)
 	} else if ok {
 		res, err := txi.Get(hash)
 		switch {
 		case err != nil:
-			return []*types.TxResult{}, errors.Wrap(err, "error while retrieving the result")
+			return []*types.TxResult{}, fmt.Errorf("error while retrieving the result: %w", err)
 		case res == nil:
 			return []*types.TxResult{}, nil
 		default:
@@ -258,7 +256,7 @@ func (txi *TxIndex) Search(ctx context.Context, q *query.Query) ([]*types.TxResu
 	for _, h := range filteredHashes {
 		res, err := txi.Get(h)
 		if err != nil {
-			return nil, errors.Wrapf(err, "failed to get Tx{%X}", h)
+			return nil, fmt.Errorf("failed to get Tx{%X}: %w", h, err)
 		}
 		results = append(results, res)