Use `rules_python` to provide pip dependencies #158

Job	Run time
build-without-terminfo (gcc12)	4m 13s
build-without-terminfo (clang16)	4m 30s
build (--config=clang-format)	4m 22s
build (--config=clang-tidy)	5m 26s
build (--compilation_mode=opt)	4m 49s
buildifier	19s
test (gcc12)	4m 33s
test (gcc12, asan)	5m 27s
test (gcc12, tsan)	5m 2s
test (gcc12, ubsan)	4m 25s
test (clang16)	5m 11s
test (clang16, asan)	4m 46s
test (clang16, tsan)	4m 48s
test (clang16, ubsan)	4m 38s
	1h 2m 29s

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