VCDA-3287: automate R1 to CAPVCD cluster creation

[arunmk]

CAPVCD core changes:

1. If there is an already created machine that is being migrated, don't create it but verify that it exists
2. If there was a dnat rule created in R1 cluster format, delete it and convert it to an LB endpoint
3. Set conditions to let control-plane pass

r1tocapvcd script:

1. Create secrets based on provided files
2. Create CAPVCD yaml for old machines and new machines
3. Apply and wait for machines to be created

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This change is