MudTable : Fix bug where CurrentPage is reset at the initialization

[vernou]

Fixes #11727

When MudTable is initialized with CurrentPage parameter, this parameter is reset at 0.

MudTable is correctly initialized with the expected CurrentPage, but next the inner MudTablePager is initialized and set MudTable.RowsPerPage what reset MudTable.CurrentPage.

---

The solution would be to rework the parameters RowsPerPage and CurrentPage to manage the new value in OnParameterSet, but the risk of breaking change is high. So maybe for a next major version.

The other solution (I implemented in this PR) is to not reset MudTable.CurrentPage when RowsPerPage is set for the first time.

Checklist:

• The PR is submitted to the correct branch (dev).
• My code follows the style of this project.
• I've added relevant tests or tested on existing ones.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.30%. Comparing base (5af5501) to head (859d1a2).
⚠️ Report is 48 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #11745      +/-   ##
==========================================
- Coverage   91.35%   91.30%   -0.05%     
==========================================
  Files         466      466              
  Lines       14697    14711      +14     
  Branches     2853     2870      +17     
==========================================
+ Hits        13426    13432       +6     
- Misses        632      636       +4     
- Partials      639      643       +4     

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