Update outdated APIM certificate to APK

[sgayangi]

• Updates the wso2carbon.pem generated from truststore
• Adds internal key issuer configs to agent test helm chart
• Fixes Update the wso2carbon certificate used in enforcer with the new APIM 4.3.0 cert #2176

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.75%. Comparing base (ae75260) to head (c3ca632).
Report is 39 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2178      +/-   ##
==========================================
+ Coverage   25.56%   27.75%   +2.18%     
==========================================
  Files          47      124      +77     
  Lines        9394    14692    +5298     
  Branches        0     2681    +2681     
==========================================
+ Hits         2402     4078    +1676     
- Misses       6861    10483    +3622     
  Partials      131      131              

Flag	Coverage Δ
adapter	27.33% <ø> (ø)
common-controller	4.07% <ø> (ø)
config-deployer-service	25.99% <ø> (?)
idp-domain-service	80.21% <ø> (?)

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