Add support for generating perf maps for simple perf profiling (#6030)

* Add support for generating perf maps for simple perf profiling

* add missing enum entry in C code

* bugfix: use hexa when printing the code region's length too (thanks bjorn3!)

* sanitize file name + use bufwriter

* introduce --profile CLI flag for wasmtime

* Update doc and doc comments for new --profile option

* remove redundant FromStr import

* Apply review feedback: make_line receives a Write impl, report errors

* fix tests?

* better docs

crates/jit/src/profiling/jitdump_disabled.rs

@@ -8,7 +8,7 @@ pub struct JitDumpAgent {
 }
 
 impl JitDumpAgent {
-    /// Intialize a JitDumpAgent and write out the header
+    /// Intialize a dummy JitDumpAgent that will fail upon instantiation.
     pub fn new() -> Result<Self> {
         if cfg!(feature = "jitdump") {
             bail!("jitdump is not supported on this platform");