e2e testing enhancements for upgrades and installs

We need to create or validate e2e testing for installs and upgrades for the following cases:

Positive Test Cases (Should Pass) (most of these are already done using provided image field, need to make sure we have similar tests using the API field):

new cluster
New Cluster install with valid customer provided image field
New cluster install with valid customer provided cockroachVersion using provided env variable
New cluster install with valid customer provided cockroachVersion using valid provided customer overriden env variable

existing cluster
Patch upgrade customer provided image field
Patch upgrade with customer provided cockroachVersion using provided env variable
Patch upgrade with customer provided cockroachVersion using provided customer overriden env variable
Feature upgrade customer provided image field
Feature upgrade with customer provided cockroachVersion using provided env variable
Feature upgrade with customer provided cockroachVersion using provided customer overriden env variable

Negative cases we need to test (expected fails):

new cluster
New cluster install with bad customer provided image field (can't pull)
New cluster install with bad customer provided cockroachVersion (can't pull)
New cluster install with valid cockroachVersion using bad customer overriden env variable (can't pull)
New cluster install with valid cockroachVersion using invalid customer overriden env variable (can pull - nginx example)
New cluster install with invalid customer provided image field (can pull - nginx example)
New cluster install with invalid customer provided cockroachVersion

existing cluster
Upgrade with bad customer provided image field (can't pull)
Upgrade with invalid customer provided image field (can pull - nginx example)
Upgrade with valid cockroachVersion using bad customer overriden env variable (can't pull)
Upgrade with valid cockroachVersion using invalid customer overriden env variable (can pull - nginx example)
Upgrade with invalid customer provided cockroachVersion
Upgrade with everything valid except customer is trying to skip a feature release (19.2 directly to 20.2)
Upgrade with everything valid except customer hasn't finalized previous upgrade