fix(ui): make Table row a bg consumer for correct hover/selection states

Table rows now participate in the bg provider/consumer system, using
the appropriate neutral token level based on their container background.
On a neutral-1 surface (e.g. inside a Card), rows step up to neutral-2
tokens for hover, selected, pressed, and disabled states.

Signed-off-by: Johan Persson <johanopersson@gmail.com>

.changeset/fix-table-row-bg-consumer.md

@@ -0,0 +1,7 @@
+---
+'@backstage/ui': patch
+---
+
+Fixed Table row hover, selected, pressed, and disabled background states to use the correct neutral token level based on the container background.
+
+**Affected components:** Table