feat: allow accessing the test environments env config

[crandles]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This pull request adds a function to the types.Environment kind that allows access of the environment configuration used by the test environment. This may allow for ad-hoc uses cases not supported by the test suite, such as: #268

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NA

Additional documentation e.g., Usage docs, etc.:

NA

[k8s-ci-robot]

Hi @crandles. Thanks for your PR.

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[vladimirvivien]

LGTM

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: crandles, vladimirvivien

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