fix: fix slice init length

[cuishuang]

What problem does this PR solve?

The intention here should be to initialize a slice with a capacity of len(components) rather than initializing the length of this slice.

The online demo: https://go.dev/play/p/q1BcVCmvidW

What is changed and how does it work?

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.

 fix slice init length

[sre-bot]

All committers have signed the CLA.

[ti-chi-bot]

Welcome @cuishuang! It looks like this is your first PR to pingcap/tidb-operator 🎉

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csuzhangxc

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• OWNERS [csuzhangxc]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-08 03:36:13.145724811 +0000 UTC m=+930728.565937824: ☑️ agreed by csuzhangxc.

[csuzhangxc]

/cherry-pick release-1.6

[ti-chi-bot]

@csuzhangxc: new pull request created to branch release-1.6: #5757.

In response to this:

/cherry-pick release-1.6

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