Fix dependencyProxy bucket validation when disabled

Closes #6423

See merge request !4996



Merged-by: Clemens Beck <cbeck@gitlab.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Approved-by: Clemens Beck <cbeck@gitlab.com>
Co-authored-by: Ayush Pandey <ayushpandey@Ayushs-MacBook-Air-2.local>

(cherry picked from commit af013cbc)

d9212e15 Fix dependencyProxy bucket validation when disabled

Co-authored-by: Clemens Beck <cbeck@gitlab.com>

Backport: Fix dependencyProxy bucket validation when disabled

See merge request !4997



Merged-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Approved-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Co-authored-by: Clemens Beck <cbeck@gitlab.com>

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