Rename SerialAdapter+SimSerial to TSIToTileLink/SimTSI/TSIHarness

[jerryz123]

The previous naming was extremely confusing.

The new naming

• TSIIO refers to a 32-bit decoupled protocol which communicates with FESVR's tsi_t
• SimTSI is simulation IP that links with FESVR, it emits TSIIO
• TSIToTileLink converts TSI read/writes to TileLink read/writes
• TSIHarness instantiates harness-side TSIToTileLink against a DUT's serial-tl port.

Related PRs / Issues:

Type of change:

• Bug fix
• New feature
• Other enhancement

Impact:

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

Contributor Checklist:

• Did you set main as the base branch?
• Is this PR's title suitable for inclusion in the changelog and have you added a changelog:<topic> label?
• Did you state the type-of-change/impact?
• Did you delete any extraneous prints/debugging code?
• Did you mark the PR with a changelog: label?
• (If applicable) Did you update the conda .conda-lock.yml file if you updated the conda requirements file?
• (If applicable) Did you add documentation for the feature?
• (If applicable) Did you add a test demonstrating the PR?

• (If applicable) Did you mark the PR as Please Backport?

[T-K-233]

Does this diagram look correct to explain the changes?

[T-K-233]

Looks good!

[jerryz123]

Yes, although I would reverse the boxes and arrows in that diagram.
Boxes should be modules/converters. Arrows should be wires/protocols