fix: return ASAP after handling finalizer

[drivebyer]

Description

Fixes #801

After we update the resource, we should return as soon as possible. Otherwise, we will get a conflict error when doing the next update.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• [ ] Tests have been added/modified and all tests pass.
• [x] Functionality/bugs have been confirmed to be unchanged or fixed.
• [x] I have performed a self-review of my own code.
• [ ] Documentation has been updated or added where necessary.

Additional Context

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 5.88235% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 38.96%. Comparing base (d121d86) to head (1e53480). Report is 52 commits behind head on master.

Files	Patch %	Lines
controllers/redis_controller.go	0.00%	3 Missing and 1 partial :warning:
controllers/rediscluster_controller.go	20.00%	3 Missing and 1 partial :warning:
controllers/redisreplication_controller.go	0.00%	3 Missing and 1 partial :warning:
controllers/redissentinel_controller.go	0.00%	3 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #940 +/- ## ========================================== + Coverage 35.20% 38.96% +3.76% ========================================== Files 19 20 +1 Lines 3213 2728 -485 ========================================== - Hits 1131 1063 -68 + Misses 2015 1594 -421 - Partials 67 71 +4 ```

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