Bug 1866252 - Disable tails call test if WebAssembly.Function is not available. r=jpages

Differential Revision: https://phabricator.services.mozilla.com/D194521

js/src/jit-test/tests/wasm/tail-calls/bug1865044.js

@@ -1,4 +1,4 @@
-// |jit-test| --more-compartments; skip-variant-if: --wasm-test-serialization, true; skip-variant-if: --wasm-compiler=ion, true; skip-if: !wasmGcEnabled()
+// |jit-test| --more-compartments; skip-variant-if: --wasm-test-serialization, true; skip-variant-if: --wasm-compiler=ion, true; skip-if: !wasmGcEnabled() || !('Function' in WebAssembly)
 
 a = newGlobal();
 a.b = this;