Sort: Various fixes and performance improvements (#2057)

* Various fixes and performance improvements

* fix a typo

Co-authored-by: Michael Debertol <michael.debertol@gmail.com>

Co-authored-by: Sylvestre Ledru <sledru@mozilla.com>
Co-authored-by: Michael Debertol <michael.debertol@gmail.com>

tests/fixtures/sort/mixed_floats_ints_chars_numeric_unique_reverse_stable.expected

@@ -0,0 +1,20 @@
+4798908.8909800
+4798908.45
+4798908.340000000000
+576,446.890
+576,446.88800000
+				37800
+               4567.
+46.89
+45
+8.013
+1.58590
+1.444
+1.040000000
+1
+
+-.05
+-1
+-8.90880
+-896689
+-2028789030

tests/fixtures/sort/multiple_decimals.expected

@@ -0,0 +1,33 @@
+-2028789030
+-896689
+-8.90880
+-1
+-.05
+
+
+
+
+
+
+
+
+000
+CARAvan
+00000001
+1
+1.040000000
+1.444
+1.58590
+8.013
+45
+46.89
+										4567..457
+               4567.
+4567.1
+4567.34
+				37800
+576,446.88800000
+576,446.890
+4798908.340000000000
+4798908.45
+4798908.8909800

tests/fixtures/sort/multiple_decimals_general.txt

@@ -0,0 +1,35 @@
+576,446.890
+576,446.88800000
+
+4567.1
+										4567..457
+						45670.89079.1
+						45670.89079.098
+4567.34
+               4567.
+45
+46.89
+-1
+1
+00000001
+4798908.340000000000
+4798908.45
+4798908.8909800
+
+
+				37800
+
+-2028789030
+-896689
+CARAvan
+
+-8.90880
+-.05
+1.444
+1.58590
+1.040000000
+
+8.013
+
+000
+

tests/fixtures/sort/multiple_decimals_numeric.txt

@@ -0,0 +1,35 @@
+576,446.890
+576,446.88800000
+
+4567.1
+										4567..457
+						45670.89079.1
+						45670.89079.098
+4567.34
+               4567.
+45
+46.89
+-1
+1
+00000001
+4798908.340000000000
+4798908.45
+4798908.8909800
+
+
+				37800
+
+-2028789030
+-896689
+CARAvan
+
+-8.90880
+-.05
+1.444
+1.58590
+1.040000000
+
+8.013
+
+000
+