Inline `ASTNode` bindings dependencies and observers (#15098) #12622

Job	Run time
check_format	1m 34s
x86_64-gnu-test (1.7.3)	33m 27s
x86_64-gnu-test (1.8.2)	34m 48s
x86_64-gnu-test-preview_mt	5m 46s
x86_64-gnu-test (1.9.2)	37m 30s
x86_64-musl-test	41m 2s
x86_64-gnu-test (1.10.1)	35m 23s
x86_64-gnu-test (1.11.2)	35m 2s
x86_64-gnu-test (1.12.2)	32m 39s
x86_64-gnu-test (1.13.3)	35m 9s
x86_64-gnu-test (1.14.0)	33m 51s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	33m 2s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	34m 32s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	33m 42s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	33m 36s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	32m 39s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	34m 5s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	33m 34s
	9h 21m 21s

Provide feedback