swap to stblib errors

[jacobbednarz]

Updates error handling to use built in methods instead of external package.

• use the errors import in favour of github.com/pkg/errors
• errors.Wrap => errors.Errof("...: %w", err)
• errors.Errorf => fmt.Errorf

Closes #968

[codecov-commenter]

Codecov Report

Merging #972 (7c5d7f8) into master (44f0966) will decrease coverage by 0.06%.
The diff coverage is 4.67%.

@@            Coverage Diff             @@
##           master     #972      +/-   ##
==========================================
- Coverage   48.59%   48.53%   -0.07%     
==========================================
  Files          97       97              
  Lines        9940     9940              
==========================================
- Hits         4830     4824       -6     
- Misses       4049     4055       +6     
  Partials     1061     1061              

Impacted Files	Coverage Δ
access_audit_log.go	79.31% <0.00%> (ø)
access_ca_certificate.go	71.23% <0.00%> (ø)
access_identity_provider.go	70.00% <0.00%> (ø)
access_keys.go	71.42% <0.00%> (ø)
access_mutual_tls_certificates.go	72.22% <0.00%> (ø)
access_organization.go	64.70% <0.00%> (ø)
access_service_tokens.go	68.42% <0.00%> (ø)
account_roles.go	53.84% <0.00%> (ø)
accounts.go	50.81% <0.00%> (ø)
api_token.go	42.52% <0.00%> (ø)
... and 78 more

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