YJIT: ZJIT: Use opt-level=1 on dev builds to avoid SystemStackError

Despite adding rb_ec_stack_check() to Rust code entry points, we've seen
SystemStackError causing test failures due to debug builds consume too
much native stack space. Let's use opt-level=1 so rustc/LLVM are more
efficient with stack space usage, hopefully enough to fit in the margin
in rb_ec_stack_check(). Continue to use opt-level=0 in the test profile.

Author: XrXr

Cargo.toml

@@ -36,11 +36,15 @@ yjit = [ "dep:yjit" ]
 zjit = [ "dep:zjit" ]
 
 [profile.dev]
-opt-level = 0
+opt-level = 1 # On 0, functions use so much stack space that we get stray `SystemStackError`s
 debug = true
 debug-assertions = true
 overflow-checks = true
 
+[profile.test]
+inherits = "dev"
+opt-level = 0
+
 [profile.dev_nodebug]
 inherits = "dev"