Add UpdateConfigMapOnly flag

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.06% :warning:

Comparison is base (8c06a63) 80.05% compared to head (67e235c) 80.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #6 +/- ## ========================================== - Coverage 80.05% 80.00% -0.06% ========================================== Files 46 46 Lines 4707 4710 +3 ========================================== Hits 3768 3768 - Misses 795 797 +2 - Partials 144 145 +1 ``` | [Files Changed](https://app.codecov.io/gh/zilliztech/milvus-operator/pull/6?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech) | Coverage Δ | | |---|---|---| | [apis/milvus.io/v1beta1/components\_types.go](https://app.codecov.io/gh/zilliztech/milvus-operator/pull/6?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech#diff-YXBpcy9taWx2dXMuaW8vdjFiZXRhMS9jb21wb25lbnRzX3R5cGVzLmdv) | `100.00% <ø> (ø)` | | | [pkg/controllers/milvus.go](https://app.codecov.io/gh/zilliztech/milvus-operator/pull/6?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech#diff-cGtnL2NvbnRyb2xsZXJzL21pbHZ1cy5nbw==) | `78.76% <0.00%> (-2.15%)` | :arrow_down: |

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[haorenfsa]

Impl in #7