`union`, `intersection` and `overlaps?` for `Range`s #12983

Job	Run time
check_format	1m 40s
x86_64-gnu-test (1.7.3)	33m 41s
x86_64-gnu-test (1.8.2)	35m 5s
x86_64-gnu-test (1.9.2)	33m 0s
x86_64-gnu-test-preview_mt	5m 48s
x86_64-gnu-test (1.10.1)	34m 47s
x86_64-gnu-test (1.11.2)	37m 49s
x86_64-gnu-test (1.12.2)	33m 28s
x86_64-musl-test	37m 1s
x86_64-gnu-test (1.13.3)	32m 35s
x86_64-gnu-test (1.14.0)	34m 15s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	33m 3s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	33m 9s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	33m 14s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	34m 22s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	32m 51s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	31m 47s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	33m 17s
	9h 10m 52s

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