Replace func name with regex for update test scripts
The patch adds an argument to update test scripts, such as update_cc_test_checks, for replacing a function name matching a regex. This functionality is needed to match generated function signatures that include file hashes. Example:
The function signature for the following function:
`__omp_offloading_50_b84c41e__Z9ftemplateIiET_i_l30_worker`
with `--replace-function-regex "__omp_offloading_[0-9]+_[a-z0-9]+_(.*)"` will become:
`CHECK-LABEL: @{{__omp_offloading_[0-9]+_[a-z0-9]+__Z9ftemplateIiET_i_l30_worker}}(`
Reviewed By: jdoerfert
Differential Revision: https://reviews.llvm.org/D97107