Use existing packages for cert and profile download/installaltion

[lpusok]

Checklist

• [x] I've read and followed the Contribution Guidelines
• [x] step.yml and README.md is updated with the changes (if needed)

Version

Requires a PATCH version update

Context

Replaced download and installation of certificates and profiles with already existing library code. This solves an issue where the HTTP error codes of network queries were not checked.

Changes

Log before:

https://app.bitrise.io/build/95c6754a-6d9e-469a-807f-72aacba19690

Log after:

https://app.bitrise.io/build/394e7782-d403-409e-a5ad-015e7af6b3be

Investigation details

Decisions