Bug 1435644: Regenerate the security/manager/ssl test certificates and keys. r=franziskus a=Aryx on a CLOSED TREE

For this, I've uncommented the relevant bits in moz.build files, then:

  ./mach build security/manager
  for dir in $(rg GeneratedTestCertificate | grep security | cut -d : -f 1); do
    cp obj-x86_64-pc-linux-gnu/$(dirname $dir)/*.pem $(dirname $dir);
  done

And same with GeneratedTestKey / *.key

MozReview-Commit-ID: C2bkSo6YYCU

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extra : amend_source : b59d21b695544a1a4b6c45ba9c00c40f8ceb0f1a