fix: pool ng-content attributes into the const pool (v22)

[brandonroberts]

Summary

Content-projection attributes were emitted inline in the ɵɵprojection call:

i0.ɵɵprojection(0, 0, ["ngProjectAs", "[card-content]", 5, ["", "card-content", ""]]);

Angular 22.0.0 (rc.3, angular/angular@2891f7e — "move projection attributes into constants") moves those attrs into the shared const pool:

const _c1 = ["ngProjectAs", "[card-content]", 5, ["", "card-content", ""]];
i0.ɵɵprojection(0, 0, _c1);

This PR mirrors that in const_collection: projection attrs are now routed through pool.get_const_literal(.., true), exactly like element attrs and the projectionDef / ngContentSelectors consts already are. Because this phase runs after generate_projection_def, the projection attrs are pooled at the next _cN, matching the Angular goldens.

Changes

• crates/oxc_angular_compiler/src/pipeline/phases/const_collection.rs — pool projection attrs into the const pool instead of emitting them inline.
• Bump the conformance Angular submodule v22.0.0-rc.2 → v22.0.0 so the suite guards this emit (rc.2 predates the change).
• Update the three ng-content integration snapshots to the pooled form.

Verification

• Conformance: 1264/1264 (100%) against the v22.0.0 goldens.
• Full oxc_angular_compiler crate suite green (unit + integration + snapshots).
• Verified end-to-end through the OXC engine in an Analog app: content-projection fixtures emit the pooled _cN form and match the Angular reference.

Reference

packages/compiler/src/template/pipeline/src/phases/const_collection.ts — op.attributes = job.pool.getConstLiteral(attrArray, true).

[brandonroberts]

@codex[agent] review

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Reviewed commit: 8113ffc6f4

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[Codex]

@codex[agent] review

Reviewed and added a small robustness fix so pooled projection attrs are applied to every ɵɵprojection op that shares the same xref (instead of being consumed on first use). Commit: 06cdb17. Also re-ran cargo test -p oxc_angular_compiler locally (pass).

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[Brooooooklyn]

@codex review

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Codex Review: Didn't find any major issues. More of your lovely PRs please.

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