feat(hal_x86_64): be less stupid about ISR tracing (#496) #1414

Job	Run time
changed_paths	5s
cargo test (host)	4m 44s
clippy	2m 55s
Loom tests (cordyceps)	1m 25s
cargo check (host)	3m 36s
docs	4m 21s
build boot image (x86_64)	3m 16s
rustfmt	20s
cargo test (cross x64)	5m 19s
Miri tests (cordyceps)	1m 56s
Loom tests (maitake)	4m 10s
Miri tests (maitake)	18m 0s
Tests (maitake, no-default-features)	1m 43s
all_systems_go	1s
	51m 51s

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