Set smoke tests blocking in release testing only

[llxia]

related: eclipse-openj9/openj9#19122

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[llxia]

@AdamBrousseau could you review the change? Thanks

[AdamBrousseau]

As per discussion, we should still block on release builds.

Suggested change

	runSmokeTests()
	if (runSmokeTests() == 'SUCCESS' || !buildConfig.RELEASE) {

Not sure if that will just check the second condition and not even bother running them though. 🤔

[llxia]

updated