espup installs potential riscv targets that are never used

[Vollbrecht]

Bug description

If i understand it correctly espup just reuse the build-artifacts from crosstool. Currently it installs gcc libs for the following 4 targets in the case of the riscv eco-system.

• rv32i_zicsr_zifencei
• rv32imac_zicsr_zifencei
• v32imafc_zicsr_zifencei
• rv32imc_zicsr_zifencei
  This libs are relative huge, and if never used should not be installed.

To Reproduce

Steps to reproduce the behavior:

install esp toolchain with espup

Expected behavior

Only install tools that eventually will be used

Screenshots

Proposal

If its true that we only use the imc and imac targets i would want that the installer directly delete the other for me ( simple option) or that croostool only produces that one that espressif uses.

[SergioGasquez]

This would slim-down what espup install, but it might not be worth to invest time into something that should be temporary, as soon as we can use LLD as linker for no_std, espup won't install GCC at all.

We can leave the issue open for the moment, in case LLD supports takes too long to land, but hopefully it won't take too much!

[Vollbrecht]

also now less relevant duo to: #391