fix db/rocksdb build and CI

[robert-zaremba]

Summary of Bug

when testing /db/rocksdb we have rocksdb build errors:

CGO_CFLAGS="-I/usr/include/rocksdb" CGO_LDFLAGS="-L/usr/lib/rocksdb -lrocksdb -lstdc++ -lm -lz -lbz2 -lsnappy -llz4 -lzstd"  go test .           
# github.com/tecbot/gorocksdb
/home/robert/go/pkg/mod/github.com/roysc/[email protected]/transactiondb.go:255:17: could not determine kind of name for C.rocksdb_optimistictransactiondb_checkpoint_object_create
/home/robert/go/pkg/mod/github.com/roysc/[email protected]/transactiondb.go:208:12: could not determine kind of name for C.rocksdb_optimistictransactiondb_property_value
/home/robert/go/pkg/mod/github.com/roysc/[email protected]/transactiondb.go:236:2: could not determine kind of name for C.rocksdb_optimistictransactiondb_write
/home/robert/go/pkg/mod/github.com/roysc/[email protected]/transactiondb.go:59:12: could not determine kind of name for C.rocksdb_transactiondb_property_value
FAIL    github.com/cosmos/cosmos-sdk/db/rocksdb [build failed]

This blocks all PRs related to /db/rocksdb (CI is trying to run them).

Possible workaround: ignore db/rocksdb in tests.

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned