Add user-specific cluster name support

[jwcesign]

Signed-off-by: jwcesign jiangwei115@huawei.com

What type of PR is this?

/kind bug

What this PR does / why we need it:
If users want to set the cluster name by themselves like

xxx@ecs-3fa1 [03:13:06 PM] [~/workspace/git/karmada] [master *]
-> % tail ~/.zshrc
export PATH=$PATH:/home/jw/workspace/sf:/usr/local/go/bin/

# karmada env
export HOST_CLUSTER_NAME=jw-karmada-host
export MEMBER_CLUSTER_1_NAME=jw-member1-push
export MEMBER_CLUSTER_2_NAME=jw-member2-push
export PULL_MODE_CLUSTER_NAME=jw-member3-pull
export KIND_LOG_FILE=${HOME}/workspace/log/karmada

It will have errors:

Which issue(s) this PR fixes:
Bugs in script to set clusters name by users

Special notes for your reviewer:
none

Does this PR introduce a user-facing change?:

none

[karmada-bot]

Welcome @jwcesign! It looks like this is your first PR to karmada-io/karmada 🎉

[jwcesign]

cc @RainbowMango

[XiShanYongYe-Chang]

It looks good to me.
Thanks~
/lgtm

[RainbowMango]

/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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