refactor: Optimize filterMappings function for backwards compatibility

[alexs-mparticle]

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

• Replaces usage of Object.fromEntries with a simple for loop for better backwards compatibility.

Testing Plan

• Was this tested locally? If not, explain why.
• Run build and automated tests
• Verify Browserstack tests

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

• Closes https://go.mparticle.com/work/SQDSDKS-7053

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[rmi22186]

lgtm

[mparticle-automation]

🎉 This PR is included in version 2.32.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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