rust: Rust sanitized snapshots variations

This adds support for correctly handling Rust sanitized snapshots,
ensuring they only have one variation.

The presence of multiple variations were causing build failures
when a rust_fuzz module for host was defined and a snapshot
build was requested.

This also sets -Z link-native-libraries=no on host modules
(in addition to device modules) to avoid emitting extra linkage
flags due to link attributes.

Bug: 282897366
Test: SOONG_SDK_SNAPSHOT_USE_SRCJAR=true m
Change-Id: Idf980c29145f11c530ad635a4eb5b01a1730ac24
diff --git a/cc/linkable.go b/cc/linkable.go
index 2099399..5b5b856 100644
--- a/cc/linkable.go
+++ b/cc/linkable.go
@@ -95,6 +95,18 @@
 
 	// IsSnapshotPrebuilt returns true if this module is a snapshot prebuilt.
 	IsSnapshotPrebuilt() bool
+
+	// IsSnapshotSanitizer returns true if this snapshot module implements SnapshotSanitizer.
+	IsSnapshotSanitizer() bool
+
+	// IsSnapshotSanitizerAvailable returns true if this snapshot module has a sanitizer source available (cfi, hwasan).
+	IsSnapshotSanitizerAvailable(t SanitizerType) bool
+
+	// SetSnapshotSanitizerVariation sets the sanitizer variation type for this snapshot module.
+	SetSnapshotSanitizerVariation(t SanitizerType, enabled bool)
+
+	// IsSnapshotUnsanitizedVariant returns true if this is the unsanitized snapshot module variant.
+	IsSnapshotUnsanitizedVariant() bool
 }
 
 // LinkableInterface is an interface for a type of module that is linkable in a C++ library.