server: create allocator no matter what mode

[rleungx]

What problem does this PR solve?

Issue Number: ref #8477

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 77.31%. Comparing base (1335ff9) to head (6acdb0e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8473      +/-   ##
==========================================
- Coverage   77.33%   77.31%   -0.02%     
==========================================
  Files         472      472              
  Lines       61739    61738       -1     
==========================================
- Hits        47744    47731      -13     
- Misses      10422    10434      +12     
  Partials     3573     3573              

Flag	Coverage Δ
unittests	77.31% <50.00%> (-0.02%)	⬇️

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JmPotato, nolouch

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-05 06:07:48.242148878 +0000 UTC m=+245798.109247958: ☑️ agreed by nolouch.
• 2024-08-05 06:08:28.372927183 +0000 UTC m=+245838.240026270: ☑️ agreed by JmPotato.

[ti-chi-bot]

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