[Enhancement] Add a load balance strategy: source ip hash

[pandaapo]

Search before asking

• [X] I had searched in the issues and found no similar issues.

Enhancement Request

Add a load balance strategy: source ip hash. Make the request from the same machine always arrive at the same server.

Describe the solution you'd like

Add a new LoadBalanceSelector for implementing source ip hash algorithm. Add unit test for new LoadBalanceSelector.

Are you willing to submit PR?

• [X] Yes I am willing to submit a PR!

[github-actions[bot]]

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