[PHP] Swoole enable opcache

[NathanFreeman]

No description provided.

[joanhey]

The OPCache is enabled for Swoole, as it's using the cli.
Without OPCache we can't use the JIT, and it's working also.

And the opcache.enable_file_override enabled, it won't give any gain in these tests.

But for me it's OK this change, as don't break, only add a little bit noise.

PD: very bad results in the last run with async postgresql, but really good with the sync postgresql.
I think that the PDOPool with 20, need to be higher.