Optimise wasm interpreter

See merge request !108

Fix interworking after commit 627ba9bf: hp must be saved when returning with longjmp, otherwise the heap gets corrupted. Hence hp must be static.

Disallow failure of 32-bit CI again, now that optimized instance calls are enabled by default in the compiler (see ccd334c7)

Remove dependency on clm fork in CI; use cpm's PrelinkByteCode

See merge request !107

Add support for .ai, jsr_i and jmp_i for optimized instance calls

See merge request !106

Add support for .ai, jsr_i and jmp_i for optimized instance calls (the 32-bit tests are temporarily allowed to fail, because the number of words used in compress depend on whether optimized instance calls are used or not)

CI: keep WebAssembly job artifacts for 3 months (previously 1 week; this caused issues in the nightlies because the nightly build needs these artifacts)

Fix in case modules other than _system would define symbols with the same name as a predefined constructor

Optimize wasm interpreter (about 30% on nfib): move instructions that use a call instruction to an outer loop, because in the SpiderMonkey register allocator calls cause early splits of live ranges