Hashes should be different (but are the same) when inputs differ by filename.

Describe the bug
a target should NOT have the same hash if input files list differs when files do not exist.

To Reproduce
Edit TargetHashser.test.ts by adding the following 2 tests:

it("creates different hashes when file path is different for non-existing file", async () => {
    const monorepo1 = await setupFixture("monorepo-with-global-files");
    const hasher = new TargetHasher({ root: monorepo1.root, environmentGlob: [] });
    const target = createTarget(monorepo1.root, "package-a", "build");
    target.inputs = ["file1.txt"];

    const hash = await getHash(hasher, target);

    const target2 = createTarget(monorepo1.root, "package-a", "build");
    target2.inputs = ["file2.txt"];

    const hash2 = await getHash(hasher, target2);

    expect(hash).not.toEqual(hash2);

    monorepo1.cleanup();
  });

  it("creates different hashes when file path is different but file content is the same", async () => {
    const monorepo1 = await setupFixture("monorepo-with-global-files");
    const hasher = new TargetHasher({ root: monorepo1.root, environmentGlob: [] });
    const target = createTarget(monorepo1.root, "package-a", "build");
    target.inputs = ["file1.txt"];
    fs.writeFileSync(path.join(monorepo1.root, "packages", "package-a", "file1.txt"), "THIS IS CONTENT");

    const hash = await getHash(hasher, target);

    const target2 = createTarget(monorepo1.root, "package-a", "build");
    target2.inputs = ["file1.txt"];
    fs.writeFileSync(path.join(monorepo1.root, "packages", "package-a", "file2.txt"), "THIS IS CONTENT2");

    const hash2 = await getHash(hasher, target2);

    expect(hash).not.toEqual(hash2);

    monorepo1.cleanup();
  });

Run test

Expected behavior
Test to pass

Open TargetHashser.test.ts and add the two reproduction cases from the issue, then run the test. Trace the TargetHasher entry point used by those tests to determine why differing input paths produce the same hash. Done means the tests pass and hashes differ for the specified input-path cases.