baritone will attempt to mine unbreakable blocks (such as bedrock or portal blocks) when building

## Some information
Operating system: windows 10 64bit
Java version: Version 8 Update 241 (build 1.8.0_241-b07)
Minecraft version: 1.15.2
Baritone version: 1.5.1
Forge mods (if used): Impact is installed (not via forge)

## How to reproduce
- go into survival
- select an area containing bedrock
- use a selection command to break the area
- baritone will try to mine the bedrock

the "fixed" version should either fail or ignore them (ignoring would be much nicer)

## Final checklist
- [x] I know how to properly use check boxes
- [x] I have included the version of Minecraft I'm running, baritone's version and forge mods (if used).
- [x] I have included logs, exceptions and / or steps to reproduce the issue.
- [x] I have not used any OwO's or UwU's in this issue.

Reproduce the selection-command scenario in survival with an area containing bedrock or portal blocks, and observe the mining behavior. Trace the block-breaking path used by building commands and verify that the completed behavior either ignores unbreakable blocks or fails without attempting to mine them.

Written by the indexing model from the issue text.