coverage: fix name of the new code_coverage_effect Expr head (#34392)

Author: vtjnash

base/compiler/ssair/driver.jl

@@ -61,7 +61,7 @@ function convert_to_ircode(ci::CodeInfo, code::Vector{Any}, coverage::Bool, narg
         codeloc = ci.codelocs[idx]
         if coverage && codeloc != prevloc && codeloc != 0
             # insert a side-effect instruction before the current instruction in the same basic block
-            insert!(code, idx, Expr(:code_coverage_marker))
+            insert!(code, idx, Expr(:code_coverage_effect))
             insert!(ci.codelocs, idx, codeloc)
             insert!(ci.ssavaluetypes, idx, Nothing)
             changemap[oldidx] += 1

src/ast.c

@@ -365,7 +365,7 @@ void jl_init_frontend(void)
     throw_undef_if_not_sym = jl_symbol("throw_undef_if_not");
     getfield_undefref_sym = jl_symbol("##getfield##");
     do_sym = jl_symbol("do");
-    coverageeffect_sym = jl_symbol("code_coverage_marker");
+    coverageeffect_sym = jl_symbol("code_coverage_effect");
     aliasscope_sym = jl_symbol("aliasscope");
     popaliasscope_sym = jl_symbol("popaliasscope");
 }