MSSQL: Current-user authentication (#113977)

* Moving things around

* Update frontend to support CUA

* Add CUA support to backend

* Copy parseURL function to where it's used

* Update test

* Remove experimental-strip-types

* Docs

* A bit more of a refactor to reduce complexity

* Revert "Remove experimental-strip-types"

This reverts commit 70fbc1c0cd.

* Review

* Docs updates

* Another docs fix

pkg/tsdb/mssql/sqleng/sql_engine_test.go

@@ -697,7 +697,7 @@ func TestGenerateConnectionString(t *testing.T) {
 
 	for _, tc := range testCases {
 		t.Run(tc.desc, func(t *testing.T) {
-			connStr, err := generateConnectionString(tc.dataSource, "", false, nil, tc.kerberosCfg, logger)
+			connStr, err := generateConnectionString(tc.dataSource, nil, tc.kerberosCfg, logger, nil, "")
 			require.NoError(t, err)
 			assert.Equal(t, tc.expConnStr, connStr)
 		})