test: add acceptance tests for fabric connection resource/data_source and update port data_source tests

[thogarty]

• Added acceptance tests for fabric connection resource and data_source
• Updated attribute checks for fabric port acceptance tests
• Updated GHA to leverage ENV variables for newly added secrets for dedicated port data and connection test data

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (a60c71f) 44.71% compared to head (a724c52) 52.29%.
Report is 8 commits behind head on main.

Files	Patch %	Lines
internal/resources/metal/metal_connection/speed.go	81.25%	3 Missing ⚠️
equinix/resource_fabric_routing_protocol.go	0.00%	2 Missing ⚠️
equinix/resource_network_device.go	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #547      +/-   ##
==========================================
+ Coverage   44.71%   52.29%   +7.57%     
==========================================
  Files          98       99       +1     
  Lines       19888    19890       +2     
==========================================
+ Hits         8893    10401    +1508     
+ Misses      10961     9340    -1621     
- Partials       34      149     +115     

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[thogarty]

Tests actually are passing. The PR is stating that it's using the up-to-date workflow file, but the test is failing because the ENV variables for secrets data aren't accessible. When running workflow manually on this target branch (which uses this branch's workflow file correctly) the tests succeed: https://github.com/equinix/terraform-provider-equinix/actions/runs/7733690362

PR is ready for merge.

[srushti-patl]

LGTM

[srushti-patl]

LGTM!