IDE Installer fix - idf_tools.py was not installing esp-clang

[jakub-kocka]

Resolving the issue reported on the ESP forum

Description

There was a fix targeting IDE Installer but the online installer had this issue still preserved. This fix should cover all the cases.

• added installation of the esp-clang

Related

• Internal tracker - IDF-11476
• IDE installer PR - https://github.com/espressif/idf-installer/pull/284
• issue on forum - https://esp32.com/viewtopic.php?f=40&t=42286

Testing

• tested with the online installer and IDF v5.3.1

[dobairoland]

LGTM

[jakub-kocka]

Thank you Roland for the review, I am merging this.