Correctly initialize and update git submodules for IDF in autobuild.sh

[gris-gris]

Fixing autobuild script so ESP32 binaries now built correctly

Summary

Describe in plain language what this PR does and why.

• What problem does it solve?
  Autobuild in github actions (nightly) not building ESP32 binaries correctly due to uninitialized submodules
• Is it a bug fix, a new feature, a cleanup/refactor…?
  CI Bug fix

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