:sparkles: Handle word boundaries and add ellipsis for `MaxDescLen`

[dhaiducek]

Both of the items here are noted in a TODO in the code:

• Implement word boundary handling
• Add ellipsis after truncated text that doesn't end in a sentence terminator.
• (not in TODO) Skips processing if the description is already less than MaxDescLen

Outstanding questions about the initial implementation:

• Whether the ellipsis should be included in the MaxDescLen--in the implementation I've added it on to the end, so the total length could technically be more than MaxDescLen in some cases.
• Whether an ellipsis should be present after the sentence terminator (this implementation skips the ellipsis in this case).

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[sbueringer]

/ok-to-test

[dhaiducek]

Sorry for the churn here--inadvertently added a commit message from a different repo. I've reset the commit and will add some integration tests in a subsequent commit. 😬

[dhaiducek]

... extend pkg/crd/testdata/cronjob_types.go ...

Hi @alvaroaleman! I've updated the gen_integration_test.go instead. It looked like the cronjob_types.go was for the CRD itself whereas the MaxDescLen is a generation configuration that needed a test at a higher level? If I'm mistaken, let me know!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alvaroaleman, dhaiducek

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[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 3424804a8454e17ad925ca222b9e72fd45e6a47a