Update mountOptions to separate options

[hongshaoyang]

First-time contributors' checklist

• I've signed Contributor License Agreement that's required for repo owners to accept my contribution.

What is changed, added, or deleted? (Required)

• Update storageClass mountOptions to 2 separate options, instead of separated by commas.

Which TiDB Operator version(s) do your changes apply to? (Required)

• master (the latest development version)
• v1.5 (TiDB Operator 1.5 versions)
• v1.4 (TiDB Operator 1.4 versions)
• v1.3 (TiDB Operator 1.3 versions)
• v1.2 (TiDB Operator 1.2 versions)

What is the related PR or file link(s)?

• https://kubernetes.io/docs/concepts/storage/storage-classes/#mount-options

• This PR is translated from:

• Other reference link(s):

[ti-chi-bot]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-13 07:03:49.381761828 +0000 UTC m=+4059826.968871974: ☑️ agreed by ran-huang.

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[yiduoyunQ]

LGTM

[ran-huang]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ran-huang

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-1.5: #2494.