SiFive Internal Release 1.5.1

What's Changed

• [PyCDE] Add @testmodule to reduce test boilerplate by @mortbopet in #3398
• [FIRRTL] Add helper utility to get InnerSym name. NFC. by @prithayan in #3406
• [PyCDE] Switch back to normal Type function by @teqdruid in #3412
• [FIRRTL] touchup EmitOMIR test so symbol names are checked by @dtzSiFive in #3410
• [PyCDE] Clock inputs and clocking blocks by @teqdruid in #3413
• [FIRRTL] Fix bug in GCT Taps XMRs by @seldridge in #3415

Full Changelog: sifive/1/5/0...sifive/1/5/1