chore(ci): update GHA secrets to new Vault path

[Langleu]

Description

related to a recent announcement of restructuring Vault.

Secrets have already been copied over to: https://vault.int.camunda.com/ui/vault/secrets/secret/list/products/zeebe/ci/

Related issues

related to INFRA-3336

Definition of Done

Not all items need to be done depending on the issue and the pull request.

Code changes:

• The changes are backwards compatibility with previous versions
• If it fixes a bug then PRs are created to backport the fix

Testing:

• There are unit/integration tests that verify all acceptance criterias of the issue
• New tests are written to ensure backwards compatibility with further versions
• The behavior is tested manually

Documentation:

• Javadoc has been written
• The documentation is updated

[github-actions]

Unit Test Results

  47 files    47 suites   1m 55s ⏱️
111 tests 111 ✔️ 0 💤 0 ❌
356 runs  356 ✔️ 0 💤 0 ❌

Results for commit fb60ff9.

[npepinpe]

/backport

[github-actions]

Backport failed for stable/8.0, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin stable/8.0
git worktree add -d .worktree/backport-448-to-stable/8.0 origin/stable/8.0
cd .worktree/backport-448-to-stable/8.0
git checkout -b backport-448-to-stable/8.0
ancref=$(git merge-base b1399cfa4bc6cde9d05b074da8197e47bc5a398c fb60ff98223f854e53068d740a83de5d6ad5bda1)
git cherry-pick -x $ancref..fb60ff98223f854e53068d740a83de5d6ad5bda1