Download network --template-source instead of reading it as a local file

[maliming]

Network --template-source was read as a local file (File.ReadAllBytes) instead of being downloaded, so pulling a template from a URL failed. It now falls through to the HTTP download; a local source also accepts a direct .zip file path and --skip-cache is honored.

Refs #24814

[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.35%. Comparing base (ce39453) to head (b3a5263).
⚠️ Report is 30 commits behind head on rel-10.5.

Files with missing lines	Patch %	Lines
...lo/Abp/Cli/ProjectBuilding/AbpIoSourceCodeStore.cs	0.00%	5 Missing ⚠️
.../Abp/Cli/ProjectBuilding/TemplateProjectBuilder.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           rel-10.5   #25670      +/-   ##
============================================
- Coverage     49.35%   49.35%   -0.01%     
============================================
  Files          3687     3687              
  Lines        124432   124430       -2     
  Branches       9507     9506       -1     
============================================
- Hits          61418    61417       -1     
+ Misses        61174    61171       -3     
- Partials       1840     1842       +2     

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