all: ensure b.ReportAllocs() in all the benchmarks (#8460)

With this change, we'll get details on the number of
allocations performed by code. Later on when we have
continuous benchmarking infrastructure, this change
will prove useful to flag regressions.

Fixes #8459

Co-authored-by: Alessio Treglia <alessio@tendermint.com>

crypto/armor_test.go

@@ -158,6 +158,8 @@ func TestUnarmorInfoBytesErrors(t *testing.T) {
 }
 
 func BenchmarkBcryptGenerateFromPassword(b *testing.B) {
+	b.ReportAllocs()
+
 	passphrase := []byte("passphrase")
 	for securityParam := 9; securityParam < 16; securityParam++ {
 		param := securityParam

crypto/keys/internal/benchmarking/bench.go

@@ -25,6 +25,7 @@ func (zeroReader) Read(buf []byte) (int, error) {
 // BenchmarkKeyGeneration benchmarks the given key generation algorithm using
 // a dummy reader.
 func BenchmarkKeyGeneration(b *testing.B, generateKey func(reader io.Reader) types.PrivKey) {
+	b.ReportAllocs()
 	var zero zeroReader
 	for i := 0; i < b.N; i++ {
 		generateKey(zero)

crypto/keys/secp256k1/bench_test.go

@@ -9,6 +9,7 @@ import (
 )
 
 func BenchmarkKeyGeneration(b *testing.B) {
+	b.ReportAllocs()
 	benchmarkKeygenWrapper := func(reader io.Reader) types.PrivKey {
 		priv := genPrivKey(reader)
 		return &PrivKey{Key: priv}
@@ -17,11 +18,13 @@ func BenchmarkKeyGeneration(b *testing.B) {
 }
 
 func BenchmarkSigning(b *testing.B) {
+	b.ReportAllocs()
 	priv := GenPrivKey()
 	benchmarking.BenchmarkSigning(b, priv)
 }
 
 func BenchmarkVerification(b *testing.B) {
+	b.ReportAllocs()
 	priv := GenPrivKey()
 	benchmarking.BenchmarkVerification(b, priv)
 }