feat(go1.18): added go1.18

[haarchri]

Signed-off-by: haarchri chhaar30@googlemail.com

Description of your changes

feat(go1.18): added go1.18

Fixes #

I have:

• [ ] Read and followed Crossplane's contribution process.
• [ ] Run make reviewable test to ensure this PR is ready for review.

How has this code been tested