refactor: update executePlugins function to operate on a slice of PluginSpec's

[ahmad-ibra]

Issue

Resolves #211

Description

The purpose of this PR is to refactor the executePlugin function to operate on a slice of PluginSpec's as opposed to a ValidatorConfig. This is prep work to help us soon support the --crd flag where users will be able to pass in CRs for various validation rules.

In the process of making these changes, I updated the oci and network plugins to fully support direct invocation of rules that previously required k8s secrets. Now those credentials/pubkeys that were defined in secrets can be defined inline within the oci and network plugin specs. To get this fully working, this PR also includes changes to:

• Update OCI prompts to support configuring inline signature verification public keys
• Update Network prompts to support configuring inline auth details for HTTPFileRules

[codecov]

Codecov Report

Attention: Patch coverage is 65.80311% with 66 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
pkg/services/validator/oci.go	25.00%	18 Missing and 6 partials ⚠️
pkg/services/validator/network.go	31.03%	17 Missing and 3 partials ⚠️
pkg/cmd/validator/validator.go	84.92%	12 Missing and 7 partials ⚠️
pkg/services/env_service.go	0.00%	2 Missing ⚠️
pkg/services/validator/rule_names.go	0.00%	1 Missing ⚠️

@@            Coverage Diff             @@
##             main     #206      +/-   ##
==========================================
- Coverage   53.33%   53.33%   -0.01%     
==========================================
  Files          45       45              
  Lines        6253     6272      +19     
==========================================
+ Hits         3335     3345      +10     
- Misses       2073     2082       +9     
  Partials      845      845              

Files with missing lines	Coverage Δ
pkg/components/validator.go	56.44% <ø> (+0.26%)	⬆️
pkg/utils/exec/exec.go	44.06% <100.00%> (ø)
pkg/utils/kube/kube.go	51.13% <100.00%> (ø)
...integration/_validator/testcases/test_validator.go	93.68% <100.00%> (ø)
pkg/services/validator/rule_names.go	42.85% <0.00%> (ø)
pkg/services/env_service.go	0.00% <0.00%> (ø)
pkg/cmd/validator/validator.go	60.84% <84.92%> (+1.37%)	⬆️
pkg/services/validator/network.go	45.83% <31.03%> (-1.19%)	⬇️
pkg/services/validator/oci.go	44.64% <25.00%> (-1.83%)	⬇️

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 57ca6cb...eb7ece1. Read the comment docs.