Fix license finder when using JH gemfile

What does this MR do and why?

Adapts license_finder in static-analysis to handle both Gemfile in gitlab-org/gitlab and jh/Gemfile on JiHu pipeline.

It creates 2 separate tasks for license_finder, one for npm, yarn and pipenv, another for bundler.

The task for bundler requires a specific --project-path, either CI_PROJECT_DIR or CI_PROJECT_DIR/jh on JiHu pipeline.

#340052

How to test?

• cherry-pick gitlab-jh/gitlab!76 (9695b842)
• Set gemfile to jh/Gemfile.

bundle config set --local gemfile jh/Gemfile`

Before, using license_finder 6.0.0

bundle exec license_finder
# fails

Update license_finder to 6.1.4:

bundle update license_finder
bundle exec license_finder --enabled-package-managers bundler --decisions-file config/dependency_decisions.yml --project-path 'jh'