feat: enforce 63-character limit on resource names

[chw120]

Fixes #342

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[janetkuo]

Please hold off this change, see #342 (comment)

[igooch]

LGTM.

As an interesting finding, I tested this with "generateName" for the SandboxClaim, and at main the extra long name prefix was not truncated and had the expected 5 unique characters appended to the name. For this PR it truncated the name prefix to the first 58 characters of the name, and still added on the unique 5 characters for a total name of 63 characters.

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This pull-request has been approved by: chw120, igooch
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[natasha41575]

/lgtm

ETA: My bad, just saw @janetkuo's above comment to hold off on this one

[janetkuo]

/hold