fix(CatalogManagement): remove deprecated arguments not supported in latest sdk

[benbuchanan]

PR to remove deprecated catalog management offering fields. Newest SDK doesn't support these values anymore so they need to be removed.

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Output from acceptance testing:

make testacc TESTARGS='-run=TestAccIBMCmOfferingSimpleArgs'
TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v -run=TestAccIBMCmOfferingSimpleArgs -timeout 700m
=== RUN   TestAccIBMCmOfferingSimpleArgs
--- PASS: TestAccIBMCmOfferingSimpleArgs (33.84s)

make testacc TESTARGS='-run=TestAccIBMCmOfferingDataSourceSimpleArgs'
TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v -run=TestAccIBMCmOfferingDataSourceSimpleArgs -timeout 700m
=== RUN   TestAccIBMCmOfferingDataSourceSimpleArgs
--- PASS: TestAccIBMCmOfferingDataSourceSimpleArgs (24.91s)

[benbuchanan]

@hkantare

[benbuchanan]

@hkantare Including additional fix in this PR to allow the required_resources field to be set on a version.

Testing output

TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v -run TestAccIBMCmVersionComplexArgs -timeout 700m
=== RUN   TestAccIBMCmVersionComplexArgs
--- PASS: TestAccIBMCmVersionComplexArgs (21.53s)