feat(billing): add support for RedeemCoupon

[scaleway-bot]

No description provided.

[changeset-bot]

⚠️ No Changeset found

Latest commit: a3853b6

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 59 lines in your changes missing coverage. Please review.

Project coverage is 4.49%. Comparing base (c80a70f) to head (a3853b6).
Report is 690 commits behind head on main.

Files with missing lines	Patch %	Lines
...s_generated/billing/src/v2beta1/marshalling.gen.ts	0.00%	43 Missing ⚠️
packages_generated/billing/src/v2beta1/api.gen.ts	0.00%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #2173       +/-   ##
==========================================
- Coverage   94.01%   4.49%   -89.53%     
==========================================
  Files          53     399      +346     
  Lines        3427   45987    +42560     
  Branches      476     834      +358     
==========================================
- Hits         3222    2067     -1155     
- Misses        205   43920    +43715     

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