Obsolete `StringAsInstanceDoubleConstant` in favor of `VerifiedDoubleReference` for constants only #2447

Job	Run time
Ruby 2.7: internal_investigation	24s
Ruby 2.7: spec	31s
Confirm config and documentation	8s
Test coverage	17s
Ruby 3.0: internal_investigation	10s
Edge RuboCop: internal_investigation	17s
Ruby 3.0: spec	17s
Oldest RuboCop: spec	18s
Edge RuboCop: spec	18s
Ruby 3.1: internal_investigation	10s
RSpec 4	17s
Ruby 3.1: spec	19s
Ruby 3.2: internal_investigation	15s
Prism	29s
Ruby 3.2: spec	17s
Ruby 3.3: internal_investigation	15s
Ruby 3.3: spec	17s
Ruby 3.4: internal_investigation	15s
Ruby 3.4: spec	21s
Ruby ruby-head: internal_investigation	11s
Ruby ruby-head: spec	21s
Ruby jruby-9.4: internal_investigation	1m 17s
Ruby jruby-9.4: spec	1m 23s
	8m 47s

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