[#24349] Add partition rules to security permissions tests and temporarily patch CMake version to 3.20

[Danipiza]

Description

This PR updates the DDS Security permission files used by compose security tests to include partition rules.

• partition not found in rule (Fast DDS AccessControl)
• subscriber validator timeouts

2026-04-14T12:52:02.9731854Z 19: ddsrouter | �[37;1m2026-04-14 12:52:02.971 
�[31;1m[�[37;1mSECURITY�[31;1m Error] �[37m* partition not found in rule. 
(/ddsrouter/src/fastdds/src/cpp/security/accesscontrol/Permissions.cpp:245)
�[34;1m -> Function �[36mcheck_create_datareader�[m

2026-04-14T12:52:02.9734037Z 19: ddsrouter | �[37;1m2026-04-14 12:52:02.972 
�[31;1m[�[37;1mSECURITY�[31;1m Error] �[37mError checking creation of local reader 
(* partition not found in rule. 
(/ddsrouter/src/fastdds/src/cpp/security/accesscontrol/Permissions.cpp:245))

After recent permission/smime updates, readers were rejected because partition constraints were missing in allow rules.

Changes

• Added partition entries in the affected permission XMLs (security compose test generators), using:
  • <partitions><partition>*</partition></partitions>
• Regenerated the corresponding signed permissions artifacts (*.smime) for those test cases.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 30.24%. Comparing base (c99abad) to head (91a6254).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #537      +/-   ##
==========================================
- Coverage   31.14%   30.24%   -0.90%     
==========================================
  Files          16       16              
  Lines         594      562      -32     
  Branches      321      298      -23     
==========================================
- Hits          185      170      -15     
+ Misses        213      205       -8     
+ Partials      196      187       -9     

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[emiliocuestaf]

LGTM

[emiliocuestaf]

LGTM with green CI