fix(HybridSaaSPool): create standby sites for all hybrid pool rules

[tanmoysrt]

• fix(HybridPool): check for specific app as per record instead of erpnext app
• fix(HybridPool): dont stop create pooling only one hybrid pool has been replenished

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 39.91%. Comparing base (45d65fc) to head (925e409).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
press/press/doctype/site/saas_pool.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2261   +/-   ##
=======================================
  Coverage   39.91%   39.91%           
=======================================
  Files         371      371           
  Lines       28093    28093           
=======================================
  Hits        11212    11212           
  Misses      16881    16881           

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[tanmoysrt]

The failed tests are not related to this, so merged.