feature: gpu for instance profile datasource

[deepaksibm]

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Relates OR Closes #0000

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestAccXXX'

...

[deepaksibm]

Do not merge. waiting for some api spec to be merged

[hkantare]

Please add test case results and also update all new attributes to docs

[deepaksibm]

$ make testacc TEST=./ibm  TESTARGS='-run=TestAccIBMISInstanceProfilesDataSource_basic'
=== RUN   TestAccIBMISInstanceProfilesDataSource_basic
--- PASS: TestAccIBMISInstanceProfilesDataSource_basic (35.33s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm 37.920s
$ make testacc TEST=./ibm  TESTARGS='-run=TestAccIBMISInstanceProfileDataSource_basic'
=== RUN   TestAccIBMISInstanceProfileDataSource_basic
--- PASS: TestAccIBMISInstanceProfileDataSource_basic (32.39s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm 36.097s

[deepaksibm]

Please add test case results and also update all new attributes to docs

Have added test case results and updated doc changes. let me know if a new test case has to be added. i didn't add a new case as it is a minor attribute addition