[minor_change] Add read-only pcTag, scope and segment attributes to aci_bridge_domain resource and datasource and add scope to aci_endpoint_security_group and aci_application_epg resources and datasources (DCNE-257)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.06452% with 21 lines in your changes missing coverage. Please review.

Project coverage is 83.74%. Comparing base (9e2dfc6) to head (d523689). Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/provider/utils.go	0.00%	16 Missing :warning:
internal/provider/resource_aci_bridge_domain.go	95.71%	3 Missing :warning:
internal/provider/resource_aci_application_epg.go	88.88%	1 Missing :warning:
...l/provider/resource_aci_endpoint_security_group.go	88.88%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1302 +/- ## ========================================== - Coverage 83.74% 83.74% -0.01% ========================================== Files 123 123 Lines 56180 56303 +123 ========================================== + Hits 47049 47150 +101 - Misses 7255 7276 +21 - Partials 1876 1877 +1 ```

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