feat: Allow OTEL_PHP_DEBUG_SCOPES_DISABLED as en environment variable… #2452

Job	Run time
php (7.4, false)	1m 11s
php (8.0, false)	1m 14s
php (8.1, false)	1m 9s
php (8.2, false)	1m 13s
php (8.3, false)	1m 4s
php (8.4, true, --ignore-platform-reqs)	52s
packages / validate (7.4, ubuntu-latest, ast, json, grpc, false)	54s
packages / validate (8.0, ubuntu-latest, ast, json, grpc, false)	1m 11s
packages / validate (8.1, ubuntu-latest, ast, json, grpc, false)	1m 10s
packages / validate (8.2, ubuntu-latest, ast, json, grpc, false)	1m 31s
packages / validate (8.3, ubuntu-latest, ast, json, grpc, false)	1m 1s
	12m 30s

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