optimization: use miscrosoft/openssl for RSA sign/verify

[y0sher]

Description

This uses is based on #1274 and uses parts from #1348.

Changes

• When running linux use https://github.com/microsoft/go-crypto-openssl/ which is orders of magnitude faster than golang std lib.
• docker to run from ubuntu golang to have openssl by default
• disable jemalloc because it clashes with openssl and causes panic (check the build and panic if jemalloc is present)

[codecov]

Codecov Report

Attention: Patch coverage is 83.07692% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 48.6%. Comparing base (1c58d5a) to head (baaedd8).

Files	Patch %	Lines
operator/keys/rsa_linux.go	82.2%	7 Missing and 4 partials ⚠️

Additional details and impacted files

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