Fix false positives for interpolation in property name in custom-property-pattern

[kawaguchi1102]

Which issue, if any, is this issue related to?

Closes #5945

Is there anything in the PR that needs further explanation?

No, it's self-explanatory.

[jeddy3]

@kawaguchi1102 Thanks for jumping on this.

Changes to rule code LGTM.

I've requested changes to the tests (as committable suggestions) to bring them in line with our conventions.

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Note: You can either refactor in this pull request (or we can create a follow-up issue) to move the duplicated code into check(property) {} function. It's up to you.

[kawaguchi1102]

@jeddy3 Sorry, I must have missed it.
i've updated it now with what you said.

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Note: You can either refactor in this pull request (or we can create a follow-up issue) to move the duplicated code into check(property) {} function. It's up to you.

That's a good idea!
I'll refactor with this PR.

[kawaguchi1102]

@jeddy3 The refactor has been completed.
I hope I am not mistaken in this refactor.

[jeddy3]

Thanks for making the changes. LGTM!

I hope I am not mistaken in this refactor.

It's looks spot on to me, thank you.

[ybiquitous]

Thank you! LGTM 👍🏼

[jeddy3]

• Fixed: custom-property-pattern false positives for interpolation in property name (#5949).