Adds pread_disk_io.cpp and pread_storage.cpp to CMakeList sources #2874

Job	Run time
build (asio-debugging=on picker-debugging=on)	8m 2s
build (extensions=off logging=off streaming=off super-seeding=off share-mode=off predictive-piece...	6m 5s
check headers	4m 17s
build (crypto=gcrypt)	7m 8s
build (mmap-disk-io=off)	7m 27s
clang-tidy	10m 1s
build dist (ubuntu-20.04)	5m 4s
build dist (ubuntu-22.04)	4m 42s
Fuzzers	14m 29s
pre-commit	1m 22s
Simulations	6h 0m 22s
Tests (webtorrent=on address-sanitizer=norecover undefined-sanitizer=norecover crypto=openssl)	13m 10s
Tests (toolset=clang logging=off address-sanitizer=norecover undefined-sanitizer=norecover)	7m 24s
Tests (thread-sanitizer=norecover crypto=openssl release debug-symbols=on cxxflags=-Wno-tsan)	14m 9s
Tests (crypto=gnutls)	8m 53s
Tests (deprecated-functions=off)	8m 24s
	8h 0m 59s

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