feat: SQDSDKS-5855 - Identity caching

[markvdouw]

Checking if we should make an identiy call or return saved MParticleUser based on last request (using timeout) and several conditions.

Instructions

1. PR target branch should be against development
2. PR title name should follow this format: https://github.com/mParticle/mparticle-workflows/blob/main/.github/workflows/pr-title-check.yml
3. PR branch prefix should follow this format: https://github.com/mParticle/mparticle-workflows/blob/main/.github/workflows/pr-branch-check-name.yml

Summary

• Adding logic to check if an identity request should be done or no based on mpId, userIdentities and params such as deviceId and googleId (implementation needed) as well as timeout and lastTime request was made.

Testing Plan

• Was this tested locally? If not, explain why.
• {explain how this has been tested, and what, if any, additional testing should be done}

Reference Issue (For mParticle employees only. Ignore if you are an outside contributor)

• Closes https://mparticle-eng.atlassian.net/browse/SQDSDKS-5975