Bump gitlab-zoekt version to 1.5.0

What does this MR do?

related gitlab-org/gitlab#516937 (closed)

This MR releases a new version of zoekt webserver (gitlab-org/cloud-native/charts/gitlab-zoekt!95 (merged)) for the main helm chart

This version has been deployed and tested in staging and production

staging: gitlab-com/gl-infra/k8s-workloads/gitlab-com!4130 (merged)

production: gitlab-com/gl-infra/k8s-workloads/gitlab-com!4131 (merged)

Related issues

Author checklist

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Required

For anything in this list which will not be completed, please provide a reason in the MR discussion.

• 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.