util: Extend simulation and trace utilities

[colluca]

• The simulation time would be taken from the first line printing the time, this included error messages. We fix this by taking the last line printing the time.
• We use the PrettyTable title feature to replace our custom title output for the test summary table.
• Dry simulation runs do not produce any log file. We should not attempt to read the return code from the log file when the run is dry.
• Add column field to annotated simulation traces. This is possible only with LLVM toolchains, so we must handle GCC and LLVM toolchains differently.
• Previously, lines without timestamps, e.g. FPU instructions executed in the same cycle as an integer instruction, were being parsed incorrectly, so they would not be annotated. Now we use a regex to handle these lines properly.
• Fix Garbled performance metrics at end of annotated traces  #85.
• In some corner cases, addr2line does not display all information for a certain function. We shift to regular expressions to parse addr2line output and correct this condition.
• Extend trace visualization utilities to include CVA6 trace in heterogeneous systems including Snitch cluster.
• Extend tracevis.py to process traces in parallel.
• Extend gen_trace.py to print the line number on an exception.