Fix minimal CI jobs running unrelated tests

What does this MR do and why?

Fixes a bug where the rspec arguments from rspec_paralellized_job are not passed through to tooling/bin/parallel_rspec

This causes problems like:

1. Geo jobs running non-Geo specs because "--tag ~geo" was not passed through.
2. Quarantined tests being run because of the missing "--tag quarantine"

etc...

Note that this problem only happens when RSPEC_TESTS_MAPPING_ENABLED is set. So impact is limited to minimal jobs in MRs.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #351391 (closed)