availability sli for SLO monitoring resource (#4344) (#625)
availability sli for SLO monitoring resource (#4344) (#625)

* inital check-in for review

* custom_flattner added

* extra line added at EOF

* PR comments implemented

* custom_expander logic is placed in encoder as it more appropriate, validation func added

* empty lines added at EOF

* PR comments implemented, Test cases added

* fixed encoder for the case where basicsli is not used in the config

Signed-off-by: Modular Magician <86ce7da8ad74b1c583667a2bebd347455fa06219@google.com>
GoogleCloudPlatform/terraform-google-conversion