Deprecate `CertRevocationResult.ServerResults` and replace it with `CertRevocationResult.OCSPResults`

[JeyJeyGao]

What is not working as expected?

Since we will introduce CRL in CertRevocationResult to differentiate between CRLResults and OCSPResults, we may need to deprecate ServerResults to make it clearer.

This suggestion was originally mentioned here: https://github.com/notaryproject/notation-core-go/pull/214/files#r1721280510

What did you expect to happen?

No

How can we reproduce it?

No

Describe your environment

source code

What is the version of your notation-core-go Library?

v1.1.0-rc.1

Given this is deprecating a field of a struct, to avoid breaking change, we still need to fill this deprecated field while initializing Result instances. This can be done in the next major version of notation-core-go by directly renaming ServerResults to OCSPResults.