Cache access tokens in local cache file to prevent MSAL throttling (#22763)

extensions/azurecore/src/constants.ts

@@ -37,6 +37,8 @@ export const TenantSection = 'tenant';
 
 export const AzureTenantConfigSection = AzureSection + '.' + TenantSection + '.' + ConfigSection;
 
+export const Filter = 'filter';
+
 export const NoSystemKeyChainSection = 'noSystemKeychain';
 
 export const oldMsalCacheFileName = 'azureTokenCacheMsal-azure_publicCloud';
@@ -72,6 +74,10 @@ export const MSALCacheName = 'accessTokenCache';
 
 export const DefaultAuthLibrary = 'MSAL';
 
+export const LocalCacheSuffix = '.local';
+
+export const LockFileSuffix = '.lockfile';
+
 export enum BuiltInCommands {
 	SetContext = 'setContext'
 }