maint: update github actions workflows

[JamieDanielson]

Which problem is this PR solving?

• With the switch to GitHub Enterprise we introduced stricter permissions at the Org level for GitHub Actions, which disallows the setting for allowing read/write for all scopes. This means we need to manually provide access to individual workflows, at least for private repos. This resulted in some failed action workflows ("Validate PR Title" failed with Error: Resource not accessible by integration)
• Also, we've renamed the internal actions repo from oss-management-actions to oss-management and the workflow wasn't able to find the redirect at least on private repos, resulting in some failed action workflows ("Apply project labels" failed with Error: Unable to resolve action. Repository not found: honeycombio/oss-management-actions).

Short description of the changes

• Update the apply-labels.yml workflow to use oss-management
• Give "write" permissions to apply-labels.yml and validate-pr-title.yml

How to verify that this has the expected result

Successful GHA workflow runs. Note the below comment related to the apply-labels workflow... at any rate this should be in a better state than it was, so I'm not sure how much time to dedicate to looking further into that 🤔

[JamieDanielson]

I think the one error with pull_request_target is failing because it needs to be pull_request, which I've changed. The other error with "Validation failed" might be specifically because of it having problems updating labels that already exist, not sure if it's a real thing or not 🤔

[MikeGoldsmith]

Outside of the pull_request on: tardet, look good 👍🏻