hack: support k3s as provider for local-up

[RidRisR]

What problem does this PR solve?

Add a new script to use k3s as k8s cluster provider and install tidb-operator
Add a new script to route between kind and k3s

What is changed and how does it work?

Add a new script to use k3s as k8s cluster provider and install tidb-operator
Add a new script to route between kind and k3s

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

Add a new script to use k3s as k8s cluster provider and install tidb-operator
Add a new script to route between kind and k3s

[ti-chi-bot]

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[csuzhangxc]

Do you want to rename this file to router.sh? or just use hack/local-up-operator.sh instead?

[RidRisR]

I overlooked this.
Maybe local-up-operator.sh is a better name, it could keep the reference consistent, if someone do referenced it.

[csuzhangxc]

/run-pull-e2e-kind-basic

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 21.47%. Comparing base (9ef26f8) to head (3c6d99e).
Report is 18 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (9ef26f8) and HEAD (3c6d99e). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (9ef26f8)	HEAD (3c6d99e)
unittest	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5727       +/-   ##
===========================================
- Coverage   61.47%   21.47%   -40.01%     
===========================================
  Files         235      219       -16     
  Lines       30653    30626       -27     
===========================================
- Hits        18843     6576    -12267     
- Misses       9920    23068    +13148     
+ Partials     1890      982      -908     

Flag	Coverage Δ
e2e	21.47% <ø> (?)
unittest	?

[csuzhangxc]

/run-pull-e2e-kind-basic

[csuzhangxc]

/cherry-pick release-1.6

[ti-chi-bot]

@csuzhangxc: new pull request created to branch release-1.6: #5747.

In response to this:

/cherry-pick release-1.6

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