test: endpoint resolution cache

[trivikr]

Issue

Internal JS-6645

Description

Test code for validating endpoint resolution cache

Testing

For subsequent calls, the endpoint is obtained from cache, and is nearly instantaneous

$ node test-endpoint-resolution-cache.mjs
time taken to resolve endpoint: 5311477 ns 
time taken to resolve endpoint: 362917 ns 
time taken to resolve endpoint: 10970 ns 
time taken to resolve endpoint: 5600 ns 
time taken to resolve endpoint: 9351 ns 

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