Add more validation checks when accessing envs from cache (microsoft#22966)

Failing tests are not related to the PR, so this is ready for review.

For microsoft#22877

Author: Kartik Raj

src/client/pythonEnvironments/base/locators/composite/envsCollectionCache.ts

@@ -245,6 +245,10 @@ export class PythonEnvInfoCache extends PythonEnvsWatcher<PythonEnvCollectionCha
             // Any environment with complete information is flushed, so this env does not contain complete info.
             return false;
         }
+        if (env.version.micro === -1 || env.version.major === -1 || env.version.minor === -1) {
+            // Env should not contain incomplete versions.
+            return false;
+        }
         const { ctime, mtime } = await getFileInfo(env.executable.filename);
         if (ctime !== -1 && mtime !== -1 && ctime === env.executable.ctime && mtime === env.executable.mtime) {
             return true;

src/test/pythonEnvironments/base/locators/composite/envsCollectionService.unit.test.ts

@@ -78,6 +78,9 @@ suite('Python envs locator - Environments Collection', async () => {
     ) {
         const env = buildEnvInfo({ executable, searchLocation, name, location, kind });
         env.id = id ?? env.id;
+        env.version.major = 3;
+        env.version.minor = 10;
+        env.version.micro = 10;
         return env;
     }