ASAN leak detection is disabled

[boquan-fang]

Problem:

We have enabled ASAN check for the CI in PR# #2410. However, seems like there are some global variables that aren't cleaned up which causes some indirect leak: test summary. Hence, for now, we have disabled the leak detection functionality of ASAN:

s2n-quic/.github/workflows/ci.yml

Lines 303 to 305 in fc39fc2

	# We got a few globals that aren't cleaned up. Need to
	# determine if we should reenable this in the future.
	ASAN_OPTIONS: detect_leaks=false

Solution:

Audit those indirect leak message and fix those leaks.

Requirements / Acceptance Criteria:

R1: ASAN should pass, even when the detect leak option is set to true.

[camshaft]

One thing to note is we do run a lot of our tests under MIRI, which does provide leak detection. ASAN checks would provide additional checks, especially where MIRI is too slow to run.