feat: env vars for cpu and nbCores pow parameters

DUNITER_POW_CPU
DUNITER_POW_NBCORES
7 jobs for pini
Status Job ID Name Coverage
  Tests
manual #56819
redshift manual
tests
 
  Package
created #56821
redshift allowed to fail manual
package:test:docker-test-image
created #56820
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releases:test
 
  Quality
created #56823
redshift
audit_dependencies
created #56822
redshift
fmt_and_clippy
 
  Integration
created #56824
redshift allowed to fail manual
sync_g1
created #56825
redshift allowed to fail manual
sync_gtest