Proof of concept for erasure-by-THIR modification. #6515

Job	Run time
fmt	1m 1s
smoke-test-and-release-macos-x86	9m 39s
smoke-test-and-release-linux	7m 4s
test-and-release-macos	14m 26s
smoke-test-and-release-windows	9m 23s
test-and-release-macos (record-history)	4m 17s
test-and-release-macos (no-std)	3m 34s
test-and-release-macos (no-alloc)	3m 51s
test-and-release-macos (singular)	3m 53s
test-and-release-macos (cvc5)	3m 19s
release	0s
	1h 0m 27s

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