Refactored init of unpooling indirection buffer to not use op and pas… #4249

Job	Run time
build-and-test / cmake-linux-x86_64	2m 25s
build-and-test / cmake-linux-aarch64	1m 50s
build-and-test / cmake-linux-armhf	1m 45s
build-and-test / cmake-linux-riscv64	6m 36s
build-and-test / cmake-linux-riscv64-rvv	10m 41s
build-and-test / cmake-windows-arm64	2m 36s
build-and-test / cmake-windows-x64	3m 3s
build-and-test / cmake-windows-x86	4m 9s
build-and-test / cmake-macos-arm64	1m 19s
build-and-test / cmake-android (arm64)	1m 24s
build-and-test / cmake-android (armv7)	1m 12s
build-and-test / cmake-android (x86)	1m 26s
build-and-test / cmake-ios-arm64	2m 4s
build-and-test / cmake-ios-x86_64	4m 28s
build-and-test / bazel-linux-x86_64-clang-18	5m 34s
build-and-test / bazel-linux-x86_64-gcc-9	3m 33s
build-and-test / bazel-linux-aarch64-clang18	1m 31s
build-and-test / bazel-linux-aarch64-gcc13	1m 27s
	57m 3s

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