Simplify Gsym inline stack fixup #731

Job	Run time
Test and coverage	2m 50s
Check generated C header	48s
Lint with clippy	56s
Benchmark	5m 59s
No-op rebuilds	1m 5s
Build [ubuntu-latest, 1.63.0, dev, ]	3m 19s
Check code formatting	20s
Test with address sanitizer	4m 6s
Build [ubuntu-latest, 1.63.0, release, ]	4m 34s
Test with leak sanitizer	2m 57s
Generate documentation	27s
Build [ubuntu-latest, stable, dev, ]	43s
Test with release build	2m 14s
Build [ubuntu-latest, stable, release, ]	43s
Build [macos-latest, 1.63.0, dev, ]	3m 44s
Build [macos-latest, 1.63.0, release, ]	4m 20s
Build [macos-latest, stable, dev, ]	57s
Build [macos-latest, stable, release, ]	1m 20s
Build [ubuntu-latest, stable, dev, --no-default-features]	32s
	41m 54s

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