add test suites for classes in hash_policy.cc file

[Sanchit-20]

Commit Message: add test suites for classes in hash_policy.cc file Additional Description: Unit test cases don't exist at all for classes defined in hash_policy.cc file at all. This PR adds the same. Risk Level: Low (No API change) Testing: All test cases passing. Docs Changes: N/A Release Notes: N/A

[repokitteh-read-only[bot]]

Hi @Sanchit-20, welcome and thank you for your contribution.

We will try to review your Pull Request as quickly as possible.

In the meantime, please take a look at the contribution guidelines if you have not done so already.

:cat:

Caused by: https://github.com/envoyproxy/envoy/pull/36708 was opened by Sanchit-20.

see: more, trace.