Update MultiHarnessBinders to connect differently typed ports + Ignore TLMonitors on DigitalTop scope

[abejgonzalez]

• Fixes issue where MultiHarnessBinders couldn't attach two ports of a different type. This matters cases where a the Port object might be slightly different from source to sink.
• Fixes case where TLMonitor might not get an implicit clock from the DigitalTop module causing an obscure error during elaboration. This fix isn't needed for the AXI4 ports since there is no AXI4 monitor implementation in RC yet, thus no monitors are created for them.

Related PRs / Issues:

Type of change:

• Bug fix
• New feature
• Other enhancement

Impact:

• RTL change
• Software change (RISC-V software)
• Build system change
• Other

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