[10.x] Fixes Expression no longer implements Stringable (#46395)

* [10.x] Fixes `Expression` no longer implements `Stringable`

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

* wip

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

* wip

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

* wip

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

---------

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

src/Illuminate/Database/Eloquent/Builder.php

@@ -6,6 +6,7 @@
 use Closure;
 use Exception;
 use Illuminate\Contracts\Database\Eloquent\Builder as BuilderContract;
+use Illuminate\Contracts\Database\Query\Expression;
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Database\Concerns\BuildsQueries;
 use Illuminate\Database\Eloquent\Concerns\QueriesRelationships;
@@ -647,6 +648,8 @@ public function sole($columns = ['*'])
     public function value($column)
     {
         if ($result = $this->first([$column])) {
+            $column = $column instanceof Expression ? $column->getValue($this->getGrammar()) : $column;
+
             return $result->{Str::afterLast($column, '.')};
         }
     }
@@ -662,6 +665,8 @@ public function value($column)
      */
     public function soleValue($column)
     {
+        $column = $column instanceof Expression ? $column->getValue($this->getGrammar()) : $column;
+
         return $this->sole([$column])->{Str::afterLast($column, '.')};
     }
 
@@ -675,6 +680,8 @@ public function soleValue($column)
      */
     public function valueOrFail($column)
     {
+        $column = $column instanceof Expression ? $column->getValue($this->getGrammar()) : $column;
+
         return $this->firstOrFail([$column])->{Str::afterLast($column, '.')};
     }
 
@@ -859,6 +866,8 @@ public function pluck($column, $key = null)
     {
         $results = $this->toBase()->pluck($column, $key);
 
+        $column = $column instanceof Expression ? $column->getValue($this->getGrammar()) : $column;
+
         // If the model has a mutator for the requested column, we will spin through
         // the results and mutate the values so that the mutated version of these
         // columns are returned as you would expect from these Eloquent models.
@@ -1775,6 +1784,8 @@ public function setModel(Model $model)
      */
     public function qualifyColumn($column)
     {
+        $column = $column instanceof Expression ? $column->getValue($this->getGrammar()) : $column;
+
         return $this->model->qualifyColumn($column);
     }