Refactor PI Instance

[michaelkad]

Community Note

• Please vote on this pull request by adding a 👍 reaction to the original pull request comment to help the community and maintainers prioritize this request
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for pull request followers and do not help prioritize the request

Relates OR Closes #0000

Output from acceptance testing:

=== RUN   TestAccIBMPIInstanceBasic
--- PASS: TestAccIBMPIInstanceBasic (516.53s)
PASS

=== RUN   TestAccIBMPIInstanceIBMiLicense
--- PASS: TestAccIBMPIInstanceIBMiLicense (618.72s)
PASS

=== RUN   TestAccIBMPIInstanceReplicant
--- PASS: TestAccIBMPIInstanceReplicant (1239.04s)
PASS

=== RUN   TestAccIBMPIInstanceNetwork
--- PASS: TestAccIBMPIInstanceNetwork (1107.70s)
PASS

=== RUN   TestAccIBMPIInstanceMixedStorage
--- PASS: TestAccIBMPIInstanceMixedStorage (1141.47s)
PASS

=== RUN   TestAccIBMPIInstanceUpdateStoppedState
--- PASS: TestAccIBMPIInstanceUpdateStoppedState (1019.82s)
PASS

=== RUN   TestAccIBMPIInstanceUpdateActiveState
--- PASS: TestAccIBMPIInstanceUpdateActiveState (1088.30s)
PASS

=== RUN   TestAccIBMPIInstanceDeploymentTypeNoStorage
--- PASS: TestAccIBMPIInstanceDeploymentTypeNoStorage (643.53s)
PASS