[prefer-switch]: Allow if-else statement with mulitple OR

[tanmoyopenroot]

PR checklist

• Addresses an existing issue: fixes Prefer-switch should ignore if-else statements with multiple OR conditions #3719
• bugfix
• Includes tests
• Documentation update

Overview of change:

Check if elseStatement is undefined

CHANGELOG.md entry:

[enhancement]: prefer-switch is more lenient with if statements containing multiple OR conditions without any else clause

[adidahiya]

thanks @tanmoyopenroot. please try to add a changelog entry next time as shown in the PR template, if possible.