build: Add new profiling target

This makes it much more convenient to build binaries for profiling
without having to modify the Cargo.toml file.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

Cargo.toml

@@ -23,6 +23,11 @@ codegen-units = 1
 opt-level = "s"
 strip = true
 
+[profile.profiling]
+inherits = "release"
+strip = false
+debug = true
+
 [dependencies]
 anyhow = "1.0.68"
 api_client = { path = "api_client" }