[fx] Replace literals with placeholder helper (#97683)
Helper function to replace literals that show up in call_function nodes in the graph to become placeholders so that they can be represented as wildcards when matching with the SubgraphMatcher. This pass causes the resulting graph to not be runnable with the original inputs since adding placeholders to the graph will change the number of inputs needed for the graph.
Test: `python test/test_fx.py TestMatcher`
Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/97683
Approved by: https://github.com/kimishpatel, https://github.com/SherlockNoMad
