Update license headers / Format codes

[vdaas-ci]

Update license headers / Format Go codes and YAML files.

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

• 🙆‍♀️ /approve - approve
• 💌 /changelog - replace the PR body by changelog details
• 🍱 /format - format codes and add licenses
• ✅ /gen-test - generate test codes
• 🏷️ /label - add labels
• ⏪ /rebase - rebase master
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[codecov]

Codecov Report

Merging #1255 (479f5e1) into master (a7452e4) will increase coverage by 0.51%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1255      +/-   ##
==========================================
+ Coverage   17.45%   17.96%   +0.51%     
==========================================
  Files         498      501       +3     
  Lines       31128    31483     +355     
==========================================
+ Hits         5433     5656     +223     
- Misses      25418    25529     +111     
- Partials      277      298      +21     

Impacted Files	Coverage Δ
internal/db/kvs/redis/redis.go	58.87% <100.00%> (ø)
internal/db/storage/blob/s3/reader/reader.go	63.73% <0.00%> (-30.77%)	⬇️
internal/backoff/backoff.go	84.61% <0.00%> (-3.08%)	⬇️
internal/net/dialer.go	79.42% <0.00%> (ø)
internal/net/net.go	49.18% <0.00%> (ø)
internal/net/option.go	89.65% <0.00%> (ø)
internal/worker/worker.go	83.33% <0.00%> (+2.08%)	⬆️

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