THRIFT-5069: Make TDeserializer resource pool friendly

Client: go

This change improves performance when using TDeserializer with a
resource pool. See https://issues.apache.org/jira/browse/THRIFT-5069 for
more context.

Also add TSerializerPool and TDeserializerPool, which are thread-safe
versions of TSerializer and TDeserializer. Benchmark result shows that
they are both faster and use less memory than the plain version:

    $ go test -bench Serializer -benchmem
    goos: darwin
    goarch: amd64
    BenchmarkSerializer/baseline-8            577558              1930 ns/op             512 B/op          6 allocs/op
    BenchmarkSerializer/plain-8               452712              2638 ns/op            2976 B/op         16 allocs/op
    BenchmarkSerializer/pool-8                591698              2032 ns/op             512 B/op          6 allocs/op
    PASS

0 files changed, 0 insertions, 0 deletions