Avoid pem::encode_many_config because of duplicate newlines

[omertuc]

We re-implement encode_many_config ourselves without the excess newlines

[openshift-ci]

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[omertuc]

/test ?

[openshift-ci]

@omertuc: The following commands are available to trigger required jobs:

• /test 4.14-images
• /test 4.15-images
• /test baremetalds-sno-recert-cluster-rename
• /test cargo-check
• /test cargo-clippy
• /test e2e-aws-ovn-single-node-recert-openshift-e2e-test-qe
• /test e2e-aws-ovn-single-node-recert-parallel
• /test e2e-aws-ovn-single-node-recert-serial
• /test images

Use /test all to run the following jobs that were automatically triggered:

• pull-ci-rh-ecosystem-edge-recert-main-4.14-images
• pull-ci-rh-ecosystem-edge-recert-main-4.15-images
• pull-ci-rh-ecosystem-edge-recert-main-cargo-check
• pull-ci-rh-ecosystem-edge-recert-main-cargo-clippy
• pull-ci-rh-ecosystem-edge-recert-main-images

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/test ?

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[omertuc]

/test baremetalds-sno-recert-cluster-rename
/test e2e-aws-ovn-single-node-recert-parallel
/test e2e-aws-ovn-single-node-recert-serial

[omertuc]

/test e2e-aws-ovn-single-node-recert-parallel
/test e2e-aws-ovn-single-node-recert-serial

[omertuc]

/test e2e-aws-ovn-single-node-recert-serial

[omertuc]

Closing in favor of #67