[cherry-pick] build: clamp PT_LOAD p_align to 4 KiB on linux-x64 node binary

[vs-code-engineering]

Cherry-pick of #319355 from main.

Node.js 23/24 linux x64 build ships a dedicated lpstub PT_LOAD segment aligned to 2 MiB (0x200000) so that, at startup the binary can remap its .text region onto Linux hugepages for an iTLB win --use-largepages=mode.

WSL1 binfmt_elf strictly rejects any PT_LOAD whose p_align exceeds the system page size (0x1000); the kernel returns ENOEXEC before user space ever runs. This breaks launching the bundled Node from the VS Code server under WSL1 starting with Node 24.

The fix does not change runtime behavior:

• Node is a non-PIE EXEC binary with fixed virtual addresses (p_vaddr, p_paddr); the loader maps each PT_LOAD at its hard-coded address regardless of p_align, which on EXEC is metadata describing alignment in memory rather than a request to relocate.
• No shared libraries, native addons, or dynamic linker paths are touched — only PT_LOAD segments inside the node executable itself.

Fixes #318494

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[vs-code-engineering]

📬 CODENOTIFY

The following users are being notified based on files changed in this PR:

@dmitrivMS

Matched files:

• test/sanity/src/context.ts
• test/sanity/src/wsl.test.ts