Fix an incorrect autocorrect for Rails/TimeZone when Time.new has a string argument

[mterada1228]

This PR fixes incorrect autocorrect for Rails/TimeZone when Time.new has a string argument.

Expected Behavior

# Before autocorrect
Time.new("2024-12-21 12:00:00")

# After autocorrect
Time.zone.parse("2024-12-21 12:00:00")

Actual Behavior

# Before autocorrect
Time.new("2024-12-21 12:00:00")

# After autocorrect
Time.zone.local("2024-12-21 12:00:00")

Autocorrected code doesn't work.

irb(main):002> Time.zone.local("2024-12-21 12:00:00")
(irb):2:in `<main>': invalid value for Integer(): "2024-12-21 12:00:00" (ArgumentError)

      time = Time.utc(*args)
                      ^^^^^

Steps to reproduce the problem

Run bundle ex rubocop -a --only Rails/TimeZone on the code below:

Time.new("2024-12-21 12:00:00")

RuboCop version

❯ rubocop -v
1.68.0

Replace this text with a summary of the changes in your PR.
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---

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• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
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• Squashed related commits together.
• Added tests.
• Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
• Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.
• If this is a new cop, consider making a corresponding update to the Rails Style Guide.

[mterada1228]

@koic

Thanks!
I totally agree with your suggestion and apply it.

[koic]

@mterada1228 This looks good to me. Can you squash your commits into one?

[mterada1228]

@koic

Thank you for your review.
I squashed my commits into one.

[koic]

Thanks!