Fix iamserviceaccount create duplicate entry check not being behind the created flag

[Skarlso]

Description

Fix the crud duplication test failure by only checking duplication if the flag is on.

Introduced in this pr: #4963

Closes #5081

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[Himangini]

Q: is this needs a skip-release-notes label? If not then can we add a good title description that goes in release notes :)

[Skarlso]

@Himangini Yeah, I was thinking about that too! I think you're right. I should create a bug for this. :)

[Skarlso]

Added an issue and title. :)

[Skarlso]

I will run a crud test for this tomorrow.

[aclevername]

@Himangini Yeah, I was thinking about that too! I think you're right. I should create a bug for this. :)

I don't think it needs to be mentioned in the release notes since its fixing a bug that never existed (never released) 😁