Improve test coverage to original since this pr reduces coverage by 7% to 75%

[SammyOina]

Codecov Report

Codecov Report

❌ Patch coverage is 38.12838% with 800 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.38%. Comparing base (42b0552) to head (c8d6b97).

Files with missing lines	Patch %	Lines
pkg/atls/internal_transport/conn.go	0.00%	107 Missing ⚠️
pkg/atls/ea/authenticator.go	54.70%	55 Missing and 46 partials ⚠️
pkg/atls/ea/request.go	41.86%	58 Missing and 17 partials ⚠️
pkg/atls/ea/certverify.go	41.93%	44 Missing and 10 partials ⚠️
pkg/atls/tls_helpers.go	0.00%	51 Missing ⚠️
pkg/atls/evidence_verifier.go	0.00%	50 Missing ⚠️
pkg/atls/server_tls.go	0.00%	48 Missing ⚠️
pkg/atls/provider.go	0.00%	38 Missing ⚠️
pkg/atls/transport.go	0.00%	28 Missing ⚠️
pkg/atls/internal_transport/protocol.go	0.00%	27 Missing ⚠️
... and 17 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #582      +/-   ##
==========================================
- Coverage   73.57%   66.38%   -7.19%     
==========================================
  Files          96      116      +20     
  Lines        6123     7134    +1011     
==========================================
+ Hits         4505     4736     +231     
- Misses       1204     1857     +653     
- Partials      414      541     +127     

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Originally posted by @codecov[bot] in #582 (comment)