feat: add package for go compiler given binary detection (#2195)

adds a unique synthetic package to the SBOM output that represents the go compiler when it is detected as a part of a package discovered by the go binary cataloger.

When using an SBOM generated by syft - downstream vulnerability scanners now have the opportunity to detect/report on the PURL/CPEs attached to the new stdlib package.
---------

Signed-off-by: Christopher Phillips <christopher.phillips@anchore.com>

syft/pkg/cataloger/golang/parse_go_binary.go

@@ -62,6 +62,7 @@ func (c *goBinaryCataloger) parseGoBinary(resolver file.Resolver, _ *generic.Env
 	for _, mod := range mods {
 		pkgs = append(pkgs, c.buildGoPkgInfo(resolver, reader.Location, mod, mod.arch)...)
 	}
+
 	return pkgs, nil, nil
 }