Introduce version to comparison number (#21913)

To do the work for
[AB#8548](https://dev.azure.com/fluidframework/235294da-091d-4c29-84fc-cdfc3d90890b/_workitems/edit/8548)
I've introduced this comparison algorithm.

This very simply and dumbly solves the problem of version comparison.

Author: tyler-cai-microsoft

packages/test/test-version-utils/src/index.ts

@@ -65,4 +65,4 @@ export {
 	SkippedTestWithDriverType,
 	SkippedErrorExpectingTestWithDriverType,
 } from "./itSkipsOnFailure.js";
-export { getRequestedVersion } from "./versionUtils.js";
+export { getRequestedVersion, versionToComparisonNumber } from "./versionUtils.js";

packages/test/test-version-utils/src/versionUtils.ts

@@ -589,3 +589,60 @@ export function versionHasMovedSparsedMatrix(version: string): boolean {
 		version >= "2.0.0-internal.2.0.0" || (!version.includes("internal") && version >= "2.0.0")
 	);
 }
+
+/**
+ * @internal
+ */
+export function versionToComparisonNumber(version: string): number {
+	if (version.startsWith("0.")) {
+		return 0;
+	}
+	if (version.startsWith("1.")) {
+		return 1;
+	}
+	if (version.startsWith("2.0.0-internal.1")) {
+		return 2;
+	}
+	if (version.startsWith("2.0.0-internal.2")) {
+		return 3;
+	}
+	if (version.startsWith("2.0.0-internal.3")) {
+		return 4;
+	}
+	if (version.startsWith("2.0.0-internal.4")) {
+		return 5;
+	}
+	if (version.startsWith("2.0.0-internal.5")) {
+		return 6;
+	}
+	if (version.startsWith("2.0.0-internal.6")) {
+		return 7;
+	}
+	if (version.startsWith("2.0.0-internal.7")) {
+		return 8;
+	}
+	if (version.startsWith("2.0.0-internal.8")) {
+		return 9;
+	}
+	if (version.startsWith("2.0.0-rc.1")) {
+		return 10;
+	}
+	if (version.startsWith("2.0.0-rc.2")) {
+		return 11;
+	}
+	if (version.startsWith("2.0.0-rc.3")) {
+		return 12;
+	}
+	if (version.startsWith("2.0.0-rc.4")) {
+		return 13;
+	}
+	if (version.startsWith("2.0.0-rc.5")) {
+		return 14;
+	}
+
+	const parsed = semver.parse(version);
+	if (!parsed) {
+		throw new Error(`Invalid version: ${version}`);
+	}
+	return parsed.major * 1_000_000 + parsed.minor * 1000 + parsed.patch + 15;
+}