create a project wrapper to run e2e tests

[ftl]

How to categorize this PR?

/kind enhancement

What this PR does / why we need it:
This change adds a small project wrapper tool that allows to run e2e tests with a STACKIT project.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Breaking changes:

[ske-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[ske-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[ske-prow]

@ftl: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cloud-provider-stackit-verify	4e83529	link	true	/test pull-cloud-provider-stackit-verify

Full PR test history. Your PR dashboard. Command help for this repository.
Please help us cut down on flakes by linking this test failure to an open flake report or filing a new flake report if you can't find an existing one. Also see the gardener testing guideline for how to avoid and hunt flakes.

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