[CI] Add inline error check linter

[okdas]

Description

Enhances the linter for inline error checks and alters existing error checks to be inline.

Type of change

Please mark the relevant option(s):

• Code health or cleanup

List of changes

• Introduces new custom linter
• Changes existing code to be compliant with new linter rule

Testing

• make develop_test; if any code changes were made
• make test_e2e on k8s LocalNet; if any code changes were made
• e2e-devnet-test passes tests on DevNet; if any code was changed
• Docker Compose LocalNet; if any major functionality was changed or introduced
• k8s LocalNet; if any infrastructure or configuration changes were made

Required Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added, or updated, godoc format comments on touched members (see: tip.golang.org/doc/comment)
• I have tested my changes using the available tooling
• I have updated the corresponding CHANGELOG

If Applicable Checklist

• I have updated the corresponding README(s); local and/or global
• I have added tests that prove my fix is effective or that my feature works
• I have added, or updated, mermaid.js diagrams in the corresponding README(s)
• I have added, or updated, documentation and mermaid.js diagrams in shared/docs/* if I updated shared/*README(s)

[okdas]

Because the change is so small, I didn't add a changelog and only validated it with make develop_test, but let me know if you want me to do more testing.

[Olshansk]

Because the change is so small, I didn't add a changelog and only validated it with make develop_test, but let me know if you want me to do more testing.

Completely agreed. Please do still add the iteration & project. It helps us track the work at the end of the sprint