NGINX Ingress: Set static election ID

What does this MR do?

NGINX Ingress: Set static election ID

The GitLab Operator ships pre-defined RBAC resources for NGINX, which scope access to specific resources. Since GitLab chart 9.2, which updated NGINX, the default lease name is dynamic, breaking NGINX in the Operator.

Relates gitlab-org/cloud-native/gitlab-operator#1908 (closed)

Changelog: fixed

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We could also apply the fix only to the Operator site, but this change also benefits other users which use their own RBAC roles instead of the ones shipped with the chart.

Related issues

Relates gitlab-org/cloud-native/gitlab-operator#1908 (closed)

Author checklist

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Required

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• Merge Request Title and Description are up to date, accurate, and descriptive.
• MR targeting the appropriate branch.
• MR has a green pipeline.
• Documentation created/updated.
• Tests added/updated, and test plan for scenarios not covered by automated tests.
• Equivalent MR/issue for omnibus-gitlab opened.

Reviewers checklist

• MR has a green pipeline on https://gitlab.com/gitlab-org/charts/gitlab.
• Consider downstream impact to the Operator, as per evaluating impact from changes to GitLab Chart.