Make E2E test `license_spec` more flexible

Song Huangrequested to merge
gitlab-jh/jh-team/gitlab:feature/qa-variable into master

What does this MR do and why?

Related to https://gitlab.com/gitlab-jh/gitlab-jh-enablement/-/issues/250#note_1085645638

These hardcodes need to be prepended in the JH edition.

MR acceptance checklist

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

/cc EM @daveliu

Edited by Song Huang

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