chore: min row validation should pass when the field is not required and no rows are present

[JessChowdhury]

Description

Updates field validation to only enforce min rows when a value is present or the field is required (this is what we state in the docs).
Applicable to the following fields: array, blocks, number, relationship.

Closes #3994

• I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• Chore (non-breaking change which does not add functionality)

Checklist:

• I have added tests that prove my fix is effective or that my feature works
• Existing test suite passes locally with my changes

[tyteen4a03]

This breaks number validation when the value is a falsy value (i.e. 0).

This line is the culprit: https://github.com/payloadcms/payload/pull/4052/files#diff-64ef6752d148ff573e45c996082e7a299ef5d29e689655e64d96c1955098f42eR210

[JarrodMFlesch]

@tyteen4a03 good catch, that line and the one below it are both problematic, will fix!

[JarrodMFlesch]

@tyteen4a03 will be fixed by this PR #4233