Bump upbound crossplane to v1.12.1-up.2

[turkenh]

Description of your changes

Consume v1.12.1-up.2 of upbound/crossplane.

As part of https://github.com/upbound/universal-crossplane/issues/369

I have:

• [x] Read and followed Upbound's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [x] Added backport release-x.y labels to auto-backport this PR, as appropriate.

How has this code been tested

make e2e

[github-actions[bot]]

Successfully created backport PR #372 for release-1.12.