Install rust tests under nativetest(64)

* Now the installation directories match those for C/C++ tests:
  * The relative_install_path refers to path under nativetest(64).
  * Device test files are installed in data/nativetest(64).
  * Automatically generated configuration files and copied test binaries
    are still in the "testcases" directory.
* Change host test configuration to run test binary files
  in testcases/<mutated_module_name>/<arch_type>/<stem_name>

Bug: 140938178
Test: atest --include-subdirs under external/rust/crates
Change-Id: I4b29afb897f4ba8749e87f79857c5b1a959bb2b0

rust/compiler.go

@@ -36,14 +36,22 @@ func (compiler *baseCompiler) setNoStdlibs() {
 	compiler.Properties.No_stdlibs = proptools.BoolPtr(true)
 }
 
-func NewBaseCompiler(dir, dir64 string) *baseCompiler {
+func NewBaseCompiler(dir, dir64 string, location installLocation) *baseCompiler {
 	return &baseCompiler{
 		Properties: BaseCompilerProperties{},
 		dir:        dir,
 		dir64:      dir64,
+		location:   location,
 	}
 }
 
+type installLocation int
+
+const (
+	InstallInSystem installLocation = 0
+	InstallInData                   = iota
+)
+
 type BaseCompilerProperties struct {
 	// whether to pass "-D warnings" to rustc. Defaults to true.
 	Deny_warnings *bool
@@ -109,10 +117,15 @@ type baseCompiler struct {
 	subDir   string
 	relative string
 	path     android.InstallPath
+	location installLocation
 }
 
 var _ compiler = (*baseCompiler)(nil)
 
+func (compiler *baseCompiler) inData() bool {
+	return compiler.location == InstallInData
+}
+
 func (compiler *baseCompiler) compilerProps() []interface{} {
 	return []interface{}{&compiler.Properties}
 }