Enable OCSP Stapling via REST API

Hi lnxgeek, give this a shot:

## Human Readable ##
POST
to: https://ltm3.test.local/mgmt/tm/sys/file/ssl-cert/example.com_2021-12-12/cert-validators
body: {“name": "letsencrypt_ocsp_R3"}

PATCH
to: https://ltm3.test.local/mgmt/tm/sys/file/ssl-cert/example.com_2021-12-12/
body: {“certValidationOptions": ["ocsp"], "issuerCert": "RE_LE_2025"}

## CURL COMMANDS ##
curl -X POST \
  'https://ltm3.test.local/mgmt/tm/sys/file/ssl-cert/example.com_2021-12-12/cert-validators' \
  --header 'Accept: */*' \
  --header 'User-Agent: Thunder Client (https://www.thunderclient.io)' \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
  --data-raw '{"name": "letsencrypt_ocsp_R3"}'

curl -X PATCH \
  'https://ltm3.test.local/mgmt/tm/sys/file/ssl-cert/example.com_2021-12-12/' \
  --header 'Accept: */*' \
  --header 'User-Agent: Thunder Client (https://www.thunderclient.io)' \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
  --data-raw '{"certValidationOptions": ["ocsp"], "issuerCert": "RE_LE_2025"}'