fix(docs): correct resource IDs for importing delegated permissions and claims mapping policy

[nbaju1]

• Updated docs for various resource to have correct resource IDs for imports.
  • azuread_claims_mapping_policy
  • azuread_service_principal_delegated_permission_grant
  • azuread_synchronization_job

Will fix #1647, #1652 and #1658.

[jackofallops]

Thanks @nbaju1 - Just one change to take a look at if you could.

[nbaju1]

@jackofallops did you get a chance to review the change?

[jmrtnz94]

Thanks for updating the docs - I ran into the error today when trying to import a azuread_synchronization_job.

[sreallymatt]

Thanks for opening this PR @nbaju1, I've left 2 minor comments inline

[sreallymatt]

Thanks @nbaju1, LGTM! ✅

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