Add OTel log support to Carnot plan protos and implement exec node support #2472

Job	Run time
env-protect-setup	6s
authorize	1s
get-dev-image / get-image	4s
clang-tidy	10m 32s
generate-matrix	3m 43s
code-coverage	0s
build-and-test (Clang opt + UI, nokvm, --config=clang --compilation_mode=opt, bazel_buildables_cl...	12m 36s
build-and-test (Clang debug, nokvm, --config=clang --compilation_mode=dbg, bazel_buildables_clang...	7m 6s
build-and-test (ASAN, nokvm, --config=asan --compilation_mode=dbg, bazel_buildables_sanitizer, ba...	8m 35s
build-and-test (TSAN, nokvm, --config=tsan --compilation_mode=dbg, bazel_buildables_sanitizer, ba...	8m 56s
build-and-test (GCC opt, nokvm, --config=gcc --compilation_mode=opt, bazel_buildables_gcc_opt, ba...	13m 33s
build-and-test (Go race detector, nokvm, --config=go_race --compilation_mode=opt, bazel_buildable...	6m 42s
build-and-test-status	1s
	1h 11m 55s

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