Add `TextMapPropagator` to instrumentation context (#1401) #54

Job	Run time
php (8.1, false)	1m 57s
php (8.2, false)	2m 43s
php (8.3, false)	2m 38s
php (8.4, true, --ignore-platform-reqs)	12m 16s
packages / validate (8.1, ubuntu-latest, ast, json, grpc, false)	55s
packages / validate (8.2, ubuntu-latest, ast, json, grpc, false)	1m 19s
packages / validate (8.3, ubuntu-latest, ast, json, grpc, false)	1m 34s
	23m 22s

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