[AUDIT] [SPARK-50229] change allattributes from lazy val to def

[amahussein]

Describe the bug

[SPARK-50229] Reduce memory usage on driver for wide schemas by reducing the lifetime of AttributeReference objects created during logical planning apache/spark@4771638b3a6

In the above Spark commit, the allAttributes in QueryPlan to be a def instead of a lazy val. This affects the implementation of the expressions on the Plugin side.
For example

spark-rapids/sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuAggregateExec.scala

Line 2016 in b471bd7

override lazy val allAttributes: AttributeSeq =

overrides the method as as a lazy val.

We need to fix that definition to match Spark4.0