tests(envtest): fix Konnect envtests sdk assertions

[pmalek]

What this PR does / why we need it:

This PR fixes an issue with some envtest based tests for Konnect entities where SDK assertions were done first and checking if the entity was indeed programmed was done after.

This causes the SDK assertions to sometimes fail (as the underlying code may not have managed to fulfil all the asserts yet).

https://github.com/Kong/gateway-operator/actions/runs/11520317393/job/32072355048?pr=806#step:5:345

    konnect_entities_kongtarget_test.go:90: FAIL:	CreateTargetWithUpstream(string,mock.argumentMatcher)
        		at: [/home/runner/work/gateway-operator/gateway-operator/controller/konnect/ops/sdk/mocks/zz_generated.kongtarget_mock.go:72 /home/runner/work/gateway-operator/gateway-operator/test/envtest/konnect_entities_kongtarget_test.go:69]
    konnect_entities_kongtarget_test.go:90: FAIL: 0 out of 1 expectation(s) were met.
        	The code you are testing needs to make 1 more call(s).
        	at: [/home/runner/work/gateway-operator/gateway-operator/test/envtest/konnect_entities_kongtarget_test.go:90 /home/runner/go/pkg/mod/golang.org/[email protected]/src/runtime/asm_amd64.s:1700]