feat(ci): add step for switch modules to maintenance mode

[yaroslavborbat]

Description

Add step in CI pipeline to switch modules to maintenance mode before running e2e tests.

Why do we need it, and what problem does it solve?

During e2e tests execution, module components may be rolled out (due to image updates, config changes, etc.), which disrupts test runs. This change prevents module rollouts by switching modules to maintenance mode before tests start.

What is the expected result?

1. Modules are in maintenance mode before e2e tests run
2. No unexpected module rollouts during tests
3. Stable and reliable e2e test execution

Checklist

• The code is covered by unit tests.
• e2e tests passed.
• Documentation updated according to the changes.
• Changes were tested in the Kubernetes cluster manually.

Changelog entries

section: ci
type: feature
summary: Add step to switch modules to maintenance mode before e2e tests.