[fix][cli] Fix the bug when set-retention specified size with -T

[Technoboy-]

Fixes #22138

Motivation

When specified with -s with -xT, it will overflow when convert long to int.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[lhotari]

LGTM. Good work @Technoboy-

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 73.54%. Comparing base (bbc6224) to head (c3fd693).
⚠️ Report is 1247 commits behind head on master.

Files with missing lines	Patch %	Lines
...ava/org/apache/pulsar/admin/cli/CmdNamespaces.java	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #22150      +/-   ##
============================================
- Coverage     73.57%   73.54%   -0.04%     
+ Complexity    32624    32116     -508     
============================================
  Files          1877     1877              
  Lines        139502   139546      +44     
  Branches      15299    15312      +13     
============================================
- Hits         102638   102627      -11     
- Misses        28908    28954      +46     
- Partials       7956     7965       +9     

Flag	Coverage Δ
inttests	24.65% <0.00%> (+0.07%)	⬆️
systests	24.24% <0.00%> (-0.08%)	⬇️
unittests	72.79% <50.00%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ava/org/apache/pulsar/admin/cli/CmdNamespaces.java	78.73% <50.00%> (ø)

... and 55 files with indirect coverage changes

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[lhotari]

There was a similar bug in pulsar-admin topics set-retention and pulsar-admin topicPolicies set-retention, fixed by #23689, please review.