Improve venv python version messages (#1501)

## Changes
Add 3.12 version message for newly released DBR 16 

(unrelated) Prohibit dots in profile names created from the extension.
Our ini lib thinks that the dot indicates a subsection and escapes it,
creating a profile under a technically different name

## Tests
<!-- How is this tested? -->

packages/databricks-vscode/src/configuration/LoginWizard.ts

@@ -283,6 +283,12 @@ export class LoginWizard {
                         type: "error",
                     };
                 }
+                if (value.includes(".")) {
+                    return {
+                        message: "Profile name cannot contain dots",
+                        type: "error",
+                    };
+                }
                 if (profiles.find((profile) => profile.name === value)) {
                     return {
                         message: `Profile ${value} already exists`,

packages/databricks-vscode/src/language/EnvironmentDependenciesVerifier.ts

@@ -153,55 +153,81 @@ export class EnvironmentDependenciesVerifier extends MultiStepAccessVerifier {
         return env.version.major === major && env.version.minor === minor;
     }
 
-    private printEnvironment(env?: ResolvedEnvironment): string {
+    private getCurrentPythonVersionMessage(env?: ResolvedEnvironment): string {
         return env?.version && env.environment
             ? `Current version is ${env.version.major}.${env.version.minor}.${env.version.micro}.`
             : "No active environments found.";
     }
 
+    private getExpectedPythonVersionMessage(dbrVersionParts: (number | "x")[]) {
+        if (dbrVersionParts[0] === 13 || dbrVersionParts[0] === 14) {
+            return "3.10";
+        }
+        if (dbrVersionParts[0] === 15) {
+            return "3.11";
+        }
+        if (dbrVersionParts[0] === 16) {
+            return "3.12";
+        }
+        if (dbrVersionParts[0] !== "x" && dbrVersionParts[0] > 16) {
+            return "3.12 or greater";
+        }
+        return "3.10 or greater";
+    }
+
+    private getVersionMismatchWarning(
+        dbrMajor: "x" | number,
+        env: ResolvedEnvironment,
+        currentPythonVersionMessage: string
+    ): string | undefined {
+        if (
+            (dbrMajor === 13 || dbrMajor === 14) &&
+            !this.matchEnvironmentVersion(env, 3, 10)
+        ) {
+            return `Use python 3.10 to match DBR ${dbrMajor} requirements. ${currentPythonVersionMessage}`;
+        }
+        if (dbrMajor === 15 && !this.matchEnvironmentVersion(env, 3, 11)) {
+            return `Use python 3.11 to match DBR ${dbrMajor} requirements. ${currentPythonVersionMessage}`;
+        }
+        if (dbrMajor === 16 && !this.matchEnvironmentVersion(env, 3, 12)) {
+            return `Use python 3.12 to match DBR ${dbrMajor} requirements. ${currentPythonVersionMessage}`;
+        }
+        return undefined;
+    }
+
     async checkPythonEnvironment(): Promise<FeatureStepState> {
+        const dbrVersionParts =
+            this.connectionManager.cluster?.dbrVersion || [];
+        const expectedPythonVersion =
+            this.getExpectedPythonVersionMessage(dbrVersionParts);
         const env = await this.pythonExtension.pythonEnvironment;
         const envVersionTooLow =
             env?.version && (env.version.major !== 3 || env.version.minor < 10);
         const noEnvironment = !env?.environment;
+        const currentPythonVersionMessage =
+            this.getCurrentPythonVersionMessage(env);
         if (noEnvironment || envVersionTooLow) {
             return this.rejectStep(
                 "checkPythonEnvironment",
-                "Activate an environment with Python >= 3.10",
-                `Databricks Connect requires python >= 3.10. ${this.printEnvironment(
-                    env
-                )}`,
+                `Activate an environment with Python ${expectedPythonVersion}`,
+                `Databricks Connect requires ${expectedPythonVersion}. ${currentPythonVersionMessage}`,
                 this.selectPythonInterpreter.bind(this)
             );
         }
         const executable = await this.pythonExtension.getPythonExecutable();
         if (!executable) {
             return this.rejectStep(
                 "checkPythonEnvironment",
-                "Activate an environment with Python >= 3.10",
+                `Activate an environment with Python ${expectedPythonVersion}`,
                 "No python executable found",
                 this.selectPythonInterpreter.bind(this)
             );
         }
-        const dbrVersionParts =
-            this.connectionManager.cluster?.dbrVersion || [];
-        let warning;
-        if (
-            (dbrVersionParts[0] === 13 || dbrVersionParts[0] === 14) &&
-            !this.matchEnvironmentVersion(env, 3, 10)
-        ) {
-            warning = `Use python 3.10 to match DBR ${
-                dbrVersionParts[0]
-            } requirements. ${this.printEnvironment(env)}`;
-        }
-        if (
-            dbrVersionParts[0] === 15 &&
-            !this.matchEnvironmentVersion(env, 3, 11)
-        ) {
-            warning = `Use python 3.11 to match DBR ${
-                dbrVersionParts[0]
-            } requirements. ${this.printEnvironment(env)}`;
-        }
+        const warning = this.getVersionMismatchWarning(
+            dbrVersionParts[0],
+            env,
+            currentPythonVersionMessage
+        );
         return this.acceptStep(
             "checkPythonEnvironment",
             `Active Environment: ${env.environment.name}`,