Two version deploy support

[hlts2]

Description:

In this PR, it includes a change to support 2 version deploy.
The workflow related to the 2 version deploy is as below.

• semver-major-minor.yaml
  • This workflow creates a release PR when there is a major/minor related commit.
• semver-patch.yaml
  • The workflow is to create a release PR when there is a commit related to patch.
• _release-pr.yml
  • This is a reusable workflow. When this is called, update the charts, k8s, ...etc with the corresponding semantic version and create a release PR.
• release.yml
  • This is the workflow for the actual release when the release PRs are merged.
• backport.yml
  • This is the workflow for backporting a feature: if a label like actions/backport/main, actions/backport/release/v1.8 exists in the PR, vdaas-ci creates a new PR to another branch (main, release/v1.8) with squash merge commit.
• determine-docker-image-tag/action.yaml
  • The docker image tag is important in realizing the 2 version deploy. Since we have created actions to determine the docker tag in the previous PR, the logic around the image tag is included here. We can get the proper docker image tag considering the current branch.
• _detect-ci-container.yml
  • This is a reusable workflow. This allows us to dynamically change the image tags of ci-container.

Related Issue:

Versions:

• Go Version: 1.21.0
• Docker Version: 20.10.8
• Kubernetes Version: v1.28.1
• NGT Version: 2.1.3

Checklist:

• I have read the CONTRIBUTING document and completed our CLA agreement.
• I have checked open Pull Requests for the similar feature or fixes?

Special notes for your reviewer:

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

• 🙆‍♀️ /approve - approve
• 🍱 /format - format codes and add licenses
• ✅ /gen-test - generate test codes
• 🏷️ /label - add labels
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	3d12458
Status:	✅  Deploy successful!
Preview URL:	https://d992a62b.vald.pages.dev
Branch Preview URL:	https://feature-ci-two-version-deplo.vald.pages.dev

View logs

[github-actions]

[FOSSA] The scan result will be available at https://app.fossa.com/projects/custom%2B21465%2Fvald/refs/branch/feature%2Fci%2Ftwo-version-deploy-support/56de9ecff8343d5ef228cb58381f2f5732674174

[vdaas-ci]

Profile Report

type	vald-agent-ngt	vald-lb-gateway	vald-discoverer	vald-manager-index
cpu
heap

other images

[kpango]

LGTM

[hlts2]

Thank you for your previous review 🙏
Sorry, I updated the license header and the approval disappeared....
There is no change to the logic.