Infra: FE: Bump pnpm to 9.15.0

[yeikel]

What changes did you make? (Give an overview)

Upgrades pnpm to the latest version(9.15.0)

Besides the expected upstream patches in pnpm , it also unblocks dependabot upgrades

See dependabot/dependabot-core#11124

How Has This Been Tested? (put an "x" (case-sensitive!) next to an item)

• Unit checks
• Integration checks
• Covered by existing automation

Checklist (put an "x" (case-sensitive!) next to all the items, otherwise the build will fail)

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (e.g. ENVIRONMENT VARIABLES)
• My changes generate no new warnings (e.g. Sonar is happy)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

A picture of a cute animal (not mandatory but encouraged)

[yeikel]

The build failure is due to pull_request_target as it is using the version of the workflow from main where 9.11.0 is still used

[Haarolean]

@yeikel should we merged given the open discussion in dependabot/dependabot-core#11124 ?

?

[yeikel]

@yeikel should we merged given the open discussion in dependabot/dependabot-core#11124 ?

Yes

But I think that we should remove the enforcement in a follow-up PR

I can update this one, too, if you prefer