[identity] Adding extensions API, identity-vscode, and identity-cache-persistence (Azure#15384)

* [identity] Remove machine-code-dependent codepaths (Azure#15024)

* [identityg Remove machine-code-dependent codepaths

* Linter fixes

* Disable broken perf test

* Added missing import back

* [identity] Add extension registration API and default credential stack

* [identity-native] Introducing identity-native

* [identity] Rework extension API.

* Remove identity native

* Identity-persistence module

* Adding identity-vscode module

* Updated rush configuration

* Moved identity perf back to linking local identity

* Symbolic refactor of extension system

* Renamed MsalCredentialOptions to CacheableCredentialOptions

* Use Symbol.for instead of hacking around SymbolConstructor

* Improved identity-vscode samples

* Use persistence by default if a persistence provider has been registered.

* Improved identity-persistence samples

* Rename to identity-cache-persistence

* Feedback from arch board for mainline identity package

* Rename CredentialPersistenceOptions, format and lint

* Revert sanitization of scopes.

* Regenerated API.md for mainline identity

* Add tests and finalize @azure/identity-cache-persistence

* Record tests for identity-cache-persistence

* Renamed sample files.

* Some changes for testing in identity

* Updated identity-vscode

* Remove async version of useIdentityExtension

* Added a couple of tests for default no-extension behavior

* Fixed tests in recorder

* Removed errant console.log

* Added basic tests of identity-vscode

* Fixed a couple of tests that have started caching correctly

* Added browser shim for extensions/consumer.ts

* Mock keytar using sinon in live/playback environments

* Disable persistence tests on node !== 12

* Addressed feedback in identity-cache-persistence

* Restore perf-test

* Removed sanitizeScopeUrl from recorder

* Update sdk/identity/identity/src/credentials/visualStudioCodeCredential.ts

Co-authored-by: Jeff Fisher <xirzec@xirzec.com>

* Fix gitignores

* Feedback for identity-vscode

* Changelog entry for recorder changes.

* core-http -> core-auth

* setter methods instead of setter props

* Some changes to docs and keywords

* Fixed linter warning

* Switch persistence tests from 12 to 14.

* Make the tests even refuse to import msal-node-extensions on anything other than Node 14

* Reverted changes to recorder

* master -> main

* More master -> main

* [identity] Make the samples extract only part of the token data

Co-authored-by: Jeff Fisher <xirzec@xirzec.com>

Author: witemple-msft

common/config/rush/common-versions.json

@@ -69,7 +69,8 @@
     // @azure/event-processor-host is on a much lower major version
     "@azure/ms-rest-nodeauth": ["^0.9.2"],
     // Idenity is moving from v1 to v2. Moving all packages to v2 is going to take a bit of time, in the mean time we could use v2 on the perf-identity tests.
-    "@azure/identity": ["2.0.0-beta.3", "^1.1.0"],
+    "@azure/identity": ["^2.0.0-beta.4", "2.0.0-beta.3", "^1.1.0"],
+    // App Config uses keyvault-secrets in a sample, switch to latest once the preview becomes GA
     // Issue #14771 tracks updating to these versions
     "@microsoft/api-extractor": ["7.13.2"],
     "prettier": ["2.2.1"],