fix: retain pod spec volume when its name has default token prefix

[wy-lucky]

In clusters prior to version 1.24, the default volume name mounted for service accounts is random. And pod spec volumes can not been updated, so we retain it.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 33.27%. Comparing base (31eb90a) to head (5693012).

Files	Patch %	Lines
pkg/controllers/sync/dispatch/retain.go	0.00%	2 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #317 +/- ## ========================================== + Coverage 33.21% 33.27% +0.05% ========================================== Files 155 155 Lines 17914 17885 -29 ========================================== + Hits 5951 5952 +1 + Misses 11454 11423 -31 - Partials 509 510 +1 ``` | [Flag](https://app.codecov.io/gh/kubewharf/kubeadmiral/pull/317/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubewharf) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/kubewharf/kubeadmiral/pull/317/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubewharf) | `33.27% <0.00%> (+0.05%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubewharf#carryforward-flags-in-the-pull-request-comment) to find out more.

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[mrlihanbo]

Can you found out the reference commit?

[wy-lucky]

Can you found out the reference commit?

It appears that there is no fixed name for it, and modifying the pod.spec.volumes is not allowed. Therefore, we will retain the pod.spec.volumes.