ub: add fd impl of uobj api in uburma

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Add fd implementation of uobj api in uburma, which support uobj to manage
fd obj in urma(e.x. urma event obj).

Signed-off-by: Guoxin Qian <qianguoxin@huawei.com>
Signed-off-by: Yizhen Fan <fanyizhen@huawei.com>