Fix the linux-asan CI lane: the font entry missed the detect_leaks=0 list

[offdev]

The $(font) ctest entry uses $(--gtest_filter=Font*) (M2-TEXT-01). The $(FontSdf*) suites added by M2-TEXT-03 match that wildcard, so the entry now also runs $(FontSdfSmoke) — the offscreen GL smoke that creates a headless EGL context.

The entry was not on the $(LAIGE_ASAN) block's $(detect_leaks=0) list, so it inherited the job-level $(ASAN_OPTIONS) with $(detect_leaks=1) and LeakSanitizer aborted it on the process-lifetime EGL display vendor state at process exit. The 2026-10-11 merge run (38097683448) shows exactly this: 464 bytes in 7 allocations, every stack allocated through $(createHeadless) (eglInitialize) or the smoke's $(submit) draw.

Every other entry whose suites can create that context (gl_context, render_thread, sprite_draw, render_counters, text_items, font_sdf, and the unfiltered laige-render_tests entry) was already on the list, which is why they passed in the same run.

Changes (tests/laige-render/CMakeLists.txt only)

• Add $(font) to the LAIGE_ASAN block's $(set_tests_properties) list — the replacement environment already carries $(LAIGE_TEST_FONT_PATH), which the entry needs (test-level ENVIRONMENT replaces the job-level one).
• Raise the entry's TIMEOUT 60 → 120 (same shape as text_items/font_sdf, which also run the offscreen smoke).
• Update the two stale comments (the entry's own note still said 'no GL calls'; the ASan-block note now names every entry that creates the context and why font is on the list).

In-run ASan/UBSan error detection stays fully active — only the at-exit vendor-state leak check is disabled for this entry, exactly like the other render entries.

Verification

• Local build-asan tree (clang++ 23, Debug, LAIGE_ASAN=ON): the generated CTestTestfile.cmake gives the font entry $(ASAN_OPTIONS=abort_on_error=1:halt_on_error=1:detect_leaks=0:log_path=...;LAIGE_TEST_FONT_PATH=...) — identical to the other render entries; the 37 GL-free Font*/FontSdf* suites pass.
• The GL smoke itself is CI-only (no local GPU access): the definitive check is the merge-lane $(linux-asan) job (ubuntu-24.04, clang++ 18) after merge. In the failed run the same smoke already passed under detect_leaks=0 in the unfiltered, text_items, and font_sdf entries of the very same process set — this change only puts the font entry on that same footing.