Fix devel planmodifier

[jaylonmcshan19-x]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

Description

Previously, the suppressDevelPlanModifier would always return the state value
for devel when a version was set, regardless of whether the user explicitly
set devel = false. This change ensures that we only suppress devel if it was not explicitly set
in the Terraform configuration

Acceptance tests

• Have you added an acceptance test for the functionality being added?

Release Note

Release note for CHANGELOG:

...

References

#1654

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