chore: fix lint errors

[Cali0707]

Recently I've been seeing a lot of linter errors in files that were not edited in the relevant PR (for example, see the files with comments from reviewdog in https://github.com/knative/eventing/pull/8087/files)

Proposed Changes

• Fix the linter errors

[Cali0707]

/cc @Leo6Leo @yijie-04 @matzew

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.80%. Comparing base (71d7e5e) to head (8c13de0).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8089      +/-   ##
==========================================
- Coverage   67.85%   67.80%   -0.06%     
==========================================
  Files         367      367              
  Lines       17354    17373      +19     
==========================================
+ Hits        11775    11779       +4     
- Misses       4844     4859      +15     
  Partials      735      735              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Leo6Leo]

https://github.com/knative/eventing/pull/8089/files#diff-b3e9222908cf8f84c96e5aeb358cfb94dad1e3e0b05717a6f731a855765f2a24

I think there are more?

[Cali0707]

I think there are more

Yeah I only covered the ones that showed up on the earlier PR before, I didn't realize that reviewdog only reported a few of the problems. I should have all the licenses in cmd, test, hack, and pkg correct now (at least for go files). I'll keep an eye on this and add more fixes as needed...

[Cali0707]

For reference, the changeset was generated by running:

find pkg -type f -name "*.go" -exec sed -i 's/\(    \)\(http:\/\/www.apache.org\/licenses\/LICENSE-2.0\)/\t\2/' {} + 

[matzew]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, matzew

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [Cali0707,matzew]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment