Refactor bp2build tests

Moves to specifying attributes as a map, such at it is possible to add
additional attributes conditionally. This is in particular useful once
supporting the `enabled` property which will add
`target_compatible_with`

Test: go test soong tests
Change-Id: Iade8eed1ce3acb1d1712a9ee3119d9ae59675624

bp2build/cc_prebuilt_library_shared_test.go

@@ -23,10 +23,9 @@ cc_prebuilt_library_shared {
 	bazel_module: { bp2build_available: true },
 }`,
 			expectedBazelTargets: []string{
-				`prebuilt_library_shared(
-    name = "libtest",
-    shared_library = "libf.so",
-)`,
+				makeBazelTarget("prebuilt_library_shared", "libtest", attrNameToString{
+					"shared_library": `"libf.so"`,
+				}),
 			},
 		})
 }
@@ -52,14 +51,13 @@ cc_prebuilt_library_shared {
 	bazel_module: { bp2build_available: true },
 }`,
 			expectedBazelTargets: []string{
-				`prebuilt_library_shared(
-    name = "libtest",
-    shared_library = select({
+				makeBazelTarget("prebuilt_library_shared", "libtest", attrNameToString{
+					"shared_library": `select({
         "//build/bazel/platforms/arch:arm": "libg.so",
         "//build/bazel/platforms/arch:arm64": "libf.so",
         "//conditions:default": None,
-    }),
-)`,
+    })`,
+				}),
 			},
 		})
 }