php-in-php: lazy IniRuntime from compileToFile thin path (#34848)

[PurHur]

Summary

• Drop eager IniRuntime::ensureLinked from Context::compileToFile for thin standalone AOT (hello-world / cold-build path).
• Call sites (JitIni, IniGet/IniSet, ErrorReporting, ZendDoubleStringRuntime, ExceptionThrowToStringSeed) already lazy-link before lookup — same pattern as php-in-php: drop Context ensureMinimalUserStandaloneBodies always-on CliArgvRuntime — lazy at CliArgvGlobalInit / compileToFile (#32122 class) #34822 CliArgv and php-in-php: drop Context ensureMinimalUserStandaloneBodies always-on StreamLifecycle/StreamRead/StreamBucket — lazy at call sites (peer #34822 / #34439) #34836 Stream* (Release v1.1.0: fix cold-build-check compile_failed on hello world (LLVM Module.php line 180; re-#24302) #32122 .1 mint class).
• Guard test: ContextMinimalStandaloneLazyIniCompileToFileRuntimeShrinkTest.

Verification

./script/phpunit.sh --filter ContextMinimalStandaloneLazyIniCompileToFileRuntimeShrinkTest
# OK (3 tests, 19 assertions)

./script/aot-smoke.sh
# aot-smoke: 8 passed, 0 failed

./script/docker-exec.sh -- bash -lc './script/cold-build-check.sh'
# cold-build-check: ok — clean-checkout compile of hello world took 3s

./script/differential-sweep.sh --aot --dir build/diff-ini-spot
# 2/2 match Zend (g05_float_render, n01_vardump_scalars)

Not run: full differential sweep (121-case), north-star5-verify --strict, compliance suites.

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