Fix Performance/MapCompact autocorrect causing invalid syntax

[QQism]

This commit fixes the issue when Performance/MapCompact auto-correction
fails to detect the argument block of an assignment method so it deletes
the block ending (i.e. end or }) when map { ... }.compact is
multiline.

Before

object.new_collection = collection.map do |item|
end.compact

# auto-corrected
object.new_collection = collection.filter_map do |item|

After

object.new_collection = collection.map do |item|
end.compact

# auto-corrected
object.new_collection = collection.filter_map do |item|
end

---

Rubocop Version

rubocop -V
1.28.2 (using Parser 3.1.2.0, rubocop-ast 1.18.0, running on ruby 3.0.1 x86_64-darwin20)
  - rubocop-performance 1.14.0

---

Before submitting the PR make sure the following are checked:

• The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
• Feature branch is up-to-date with master (if not - rebase it).
• 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.

[koic]

Nice! Thank you 👍