Merge pull request #15078 from nbudin/fix_merger_filter_binds_comparison_master

Make filter_binds filter out symbols that are equal to strings

Conflicts:
	activerecord/CHANGELOG.md

Conflicts:
	activerecord/CHANGELOG.md
	activerecord/lib/active_record/relation/merger.rb
	activerecord/test/cases/relation/merging_test.rb